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GREquant800
Joined: 11 Sep 2009
Posts: 68
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 Posted: Wed Jul 28, 2010 10:56 am Post subject: GRE QUANT DATABASE(UPDATED TILL JULY 27TH' 10) |
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Quant:
1. Given the mean of a 7 numbers set as 40. If the mean of 5 numbers of the set is 33, find the mean of other 2 numbers?
(Similar to this)
2. Given that an = n – (1/ n+1) and ‘n’ ranges from 1 to 101. Find the summation of the terms (a1 to a101)?
(Similar to this)
3. If the probability of ‘A’ doing a task is 2/3 and ‘B’ doing the same task is 4/7, find the probability that neither of them do the task?
(Similar to this)
4. Given that t^2 – ty < 0
Col A: t
Col B: y
5. A person travels first 2 hrs of his journey at 55 miles/hr and next 2.2 hrs of his journey at 65 miles/hr to reach his destination. On his return journey, if he travels at 50 miles/hr then how much extra time would he take to reach back?
(Similar to this)
6.
Given a figure like above. If the radius of the circle is 8, find the area of the shaded region? |
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hamid
Joined: 23 Jul 2010
Posts: 6
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| Posted: Wed Jul 28, 2010 3:41 pm Post subject: |
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1.57.5
2.101x51-(1/2+1/3+....+1/102) [Help regarding solution,plz]
3.3/21=1/7
4.D
5.0.86 hour
6.64-16pi
Correct me and if possible explain the way to solve 2
Thanks |
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therani.arch
Joined: 19 Jul 2010
Posts: 65
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| Posted: Wed Jul 28, 2010 3:47 pm Post subject: |
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1. 52.5
2. ?
3. 1/7
4. D
5. 0.86
6. 64-16(pie)
What is the sum of Harmonic Series? |
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sunitha2425
Joined: 28 Jul 2010
Posts: 2
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sunitha2425
Joined: 28 Jul 2010
Posts: 2
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| Posted: Wed Jul 28, 2010 4:43 pm Post subject: |
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can v solve 4th prob like this..
t^2-ty<0
so t^2<ty
t^2/t<ty/t
t<y
i m in quants lemme know if any mistakes !! |
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anksh22
Joined: 27 Jul 2010
Posts: 10
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| Posted: Wed Jul 28, 2010 6:05 pm Post subject: plz help |
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1. its 54.5 (according to me)
2. plz helpppp
4. t<y |
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anksh22
Joined: 27 Jul 2010
Posts: 10
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| Posted: Wed Jul 28, 2010 6:10 pm Post subject: database |
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did u get any questions from database?
My exam is on 4th Aug. so i have doubt whether July database will be useful or not? |
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therani.arch
Joined: 19 Jul 2010
Posts: 65
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| Posted: Wed Jul 28, 2010 8:30 pm Post subject: |
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Sorry Correction
1. 57.5
2. ?
3. 1/7
4. D
5. 0.86
6. 64-16(pie)
What is the sum of Harmonic Series? |
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nehareddy4u
Joined: 23 Jul 2010
Posts: 66
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| Posted: Thu Jul 29, 2010 8:31 am Post subject: |
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1. 57.5
2. 5151-(1/2+1/3+....+1/102)
3. 1/7
4. D
5. 0.86 hr
6. 64-16pi |
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anksh22
Joined: 27 Jul 2010
Posts: 10
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| Posted: Fri Jul 30, 2010 6:48 pm Post subject: Re: plz help |
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| anksh22 wrote: | 1. its 54.5 (according to me)
2. plz helpppp
4. t<y |
sorry its 57.5 only....  |
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anksh22
Joined: 27 Jul 2010
Posts: 10
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| Posted: Fri Jul 30, 2010 6:55 pm Post subject: 3rd question |
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| sumbdy plz explain me 3rd question.. i know its really easy, but i hav problem in probability...!! |
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nehareddy4u
Joined: 23 Jul 2010
Posts: 66
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| Posted: Sat Jul 31, 2010 2:18 am Post subject: Re: 3rd question |
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| anksh22 wrote: | | sumbdy plz explain me 3rd question.. i know its really easy, but i hav problem in probability...!! |
The prob of A= 2/3.. not doing is 1-2/3 ==> 1/3
The prob of B= 4/7.. not doing is 1-4/7 ==> 3/7
so prob of both not doing either or both ==> 1/3 * 3/7 ==> 1/7 |
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k_srinadh
Joined: 27 Jul 2010
Posts: 8
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| Posted: Sat Jul 31, 2010 8:00 am Post subject: answers |
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1) 57.5
2) according to me we have to caliculate n value for 1 and 101 and then we can substitute in the formula sum of terms= n/2(least term - highest term)
here n= number of terms b/w 1 and 101 i,e 100
l.t = value got by substituting 1 in An.
h.t= valure obtained aftr sub 101 in An.
(correct me if i am wrong)
3)1-2/3 =1/3
1-4/7=3/7
now 1/3*3/7=3/21=1/7
4)t<y (according to me)
5)1st case dis =2*55=110
2nd case dis=2.2*65=143.
tot dis=110+143=253
now we have to divide 253/50=5.06
now tot time taken round jrny in 1st nd 2nd case =2+2.2=4.2
now to get6 xtra time 5.06-4.2=0.86
6) 64-16pie
plz correct me if i am wrong
srinadh kanagala |
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k_srinadh
Joined: 27 Jul 2010
Posts: 8
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| Posted: Sat Jul 31, 2010 8:59 am Post subject: Re: answers |
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| k_srinadh wrote: | 1) 57.5
2) according to me we have to caliculate n value for 1 and 101 and then we can substitute in the formula sum of terms= n/2*(least term + highest term)
here n= number of terms b/w 1 and 101 i,e 100
l.t = value got by substituting 1 in An.
h.t= valure obtained aftr sub 101 in An.
(correct me if i am wrong)
3)1-2/3 =1/3
1-4/7=3/7
now 1/3*3/7=3/21=1/7
4)t<y (according to me)
5)1st case dis =2*55=110
2nd case dis=2.2*65=143.
tot dis=110+143=253
now we have to divide 253/50=5.06
now tot time taken round jrny in 1st nd 2nd case =2+2.2=4.2
now to get6 xtra time 5.06-4.2=0.86
6) 64-16pie
plz correct me if i am wrong
srinadh kanagala |
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k_srinadh
Joined: 27 Jul 2010
Posts: 8
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| Posted: Sat Jul 31, 2010 9:02 am Post subject: Re: answers |
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| k_srinadh wrote: | | k_srinadh wrote: | 1) 57.5
2) according to me we have to caliculate n value for 1 and 101 and then we can substitute in the formula sum of terms= n/2*(least term + highest term)
here n= number of terms b/w 1 and 101 i,e 100
l.t = value got by substituting 1 in An.
h.t= valure obtained aftr sub 101 in An.
so 0.45 should be the answer.
(correct me if i am wrong)
3)1-2/3 =1/3
1-4/7=3/7
now 1/3*3/7=3/21=1/7
4)t<y (according to me)
5)1st case dis =2*55=110
2nd case dis=2.2*65=143.
tot dis=110+143=253
now we have to divide 253/50=5.06
now tot time taken round jrny in 1st nd 2nd case =2+2.2=4.2
now to get6 xtra time 5.06-4.2=0.86
6) 64-16pie
plz correct me if i am wrong
srinadh kanagala |
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