Search found 38 matches
Permutation & Combination
There are four ladies with different heights are posing for a photograph. Photographer want them to stand in 2 rows with shorter women in front row. How many arrangments are possible ?
- by akpareek
Thu Nov 21, 2013 2:24 am- Forum: Problem Solving
- Topic: Permutation & Combination
- Replies: 2
- Views: 1203
Probability
Tanya prepared four different letters to be sent to four different addresses. For each letter she prepared an envelope with its correct address. If the four letters to be put into envelopes at random, what is the probability that only one letter will put in to the envelope with ots correct address? ...
- by akpareek
Thu Nov 21, 2013 2:19 am- Forum: Problem Solving
- Topic: Probability
- Replies: 3
- Views: 1252
Probability problem...need explanation plzz
M= {-6, -5, -4, -3, -2}
T= {-2, -1, 0, 1, 2, 3}
If an integer is to be randomly selected from set M above and an integer is to be randomly selected from set T above, what is the probability that the product of the two integers will be negative?
A. 0
B. 1/3
C. 2/5
D. 1/2
E. 3/5
- by akpareek
Wed Sep 04, 2013 11:03 am- Forum: Problem Solving
- Topic: Probability problem...need explanation plzz
- Replies: 4
- Views: 4015
Someone explain it please...
If ab=1, what is the value of (axb)(ayb)? 1. ax= by= 2 2. 2xy= 4 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE i...
- by akpareek
Wed Sep 04, 2013 10:44 am- Forum: Data Sufficiency
- Topic: Someone explain it please...
- Replies: 1
- Views: 950
Someone explain it please...
If ab=1, what is the value of (axb)(ayb)? 1. ax= by= 2 2. 2xy= 4 A. Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient. B. Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient. C. BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE i...
- by akpareek
Wed Sep 04, 2013 10:36 am- Forum: Data Sufficiency
- Topic: Someone explain it please...
- Replies: 1
- Views: 1022
Number property problem, need explanation plzz
The function f is defined by f(x)= √x-10 for all positive numbers x. If u= f(t) for some positive numbers t and u. What is it terms of u?
A. √(u+10)
B. √(u+10)2
C. √(u+10)
D. (u+10)2
E. (u2+10)2 [/img][/list][/list][/spoiler][/quote]
- by akpareek
Wed Sep 04, 2013 9:54 am- Forum: Problem Solving
- Topic: Number property problem, need explanation plzz
- Replies: 2
- Views: 1060
Need explanation for probability problem.
If a certain coin is flipped, the probability that the coin will land heads is 1/2. If the coin is flipped 5 times, what is the probability that it will land heads up on the first 3 flips and not on the last 2-flips ?
A. 3/5
B. 1/2
C. 1/5
D. 1/8
E. 1/32
- by akpareek
Wed Sep 04, 2013 9:03 am- Forum: Problem Solving
- Topic: Need explanation for probability problem.
- Replies: 7
- Views: 4668
Number property problem, need explanation plz
The sequence a1, a2,.....an...is such that an= 2an-1-x for all positive integers n>=2 and for certain number x. If a5=99 and a3=27, what is the value of x ?
A. 3
B. 9
C. 18
D. 36
E. 45
- by akpareek
Wed Sep 04, 2013 8:44 am- Forum: Problem Solving
- Topic: Number property problem, need explanation plz
- Replies: 3
- Views: 1023
Need explanation for probability problem (URGENT)
A box contains 10 light bulbs, fewer than half of which are defective. Two bulbs are to be drawn simultaneously from the box. If n of the bulbs in box are defective, what is the value of n? 1) The probability that the 2-bulbs to be drawn will be defective is 1/15. 2) The probability that the 2-bulbs...
- by akpareek
Tue Sep 03, 2013 11:37 am- Forum: Problem Solving
- Topic: Need explanation for probability problem (URGENT)
- Replies: 3
- Views: 1150
Need explanation for statistics problem
In a demographic study, the population and total income of a certain region were estimated from other data, and both estimates had lower and upper limits. At the time of the estimates, was the per capita income for the region greater than $16,500 ? 1) the lower limit for the estimate of the populati...
- by akpareek
Tue Sep 03, 2013 10:09 am- Forum: Problem Solving
- Topic: Need explanation for statistics problem
- Replies: 3
- Views: 1909
Percentage problem %%
In a survey conducted, it was found that 80% of the women surveyed were using atleast one of the three brands Lali, Ren and Ana. 40% of those surveyed were using Lali, 30% of the surveyed women were using Ren and 60% of the surveyed women were using Ana. 20% of the surveyed women use all the tree b...
- by akpareek
Mon Apr 08, 2013 8:58 am- Forum: Problem Solving
- Topic: Percentage problem %%
- Replies: 2
- Views: 1144
Relative speed on circular path
In a circular track of 100 meters A with the speed of 2m/s starts after 10 seconds of start of B with the speed of 4m/s. After how many seconds will they meet first time after the start of B ?
A) 10 B) 20 C) 30 D) 40 E) 50
- by akpareek
Wed Feb 13, 2013 7:59 am- Forum: Problem Solving
- Topic: Relative speed on circular path
- Replies: 4
- Views: 7219
Relative speed on circular path
John, Vicky and David starts with 2 m/s, 2.5 m/s and 5 m/s at same point at same time in 100 meters circular track. John and David start in anti-clock direction whereas Vicky starts in clock-wise direction. After how many seconds will they meet second time? A) 100/3 B) 200/3 C) 100 D) 400/3 E) 200
- by akpareek
Mon Feb 11, 2013 7:21 am- Forum: Problem Solving
- Topic: Relative speed on circular path
- Replies: 4
- Views: 3394
Permutation Problem
How many 3 digit number exist having exactly two 5's in them ?
A. 24 B. 26 C. 27 D. 29 E. 30
- by akpareek
Mon Aug 09, 2010 12:02 pm- Forum: Problem Solving
- Topic: Permutation Problem
- Replies: 5
- Views: 1126
Permutation Problem
A= (0,1,2,3,4,5). how many 3 digit numbers can be made using digits of set A such that number is divisible by 5 ?
A. 40 B. 60 C. 120 D. 180 E. 216
- by akpareek
Mon Aug 09, 2010 11:59 am- Forum: Problem Solving
- Topic: Permutation Problem
- Replies: 3
- Views: 991