Search found 19 matches
The question says, the probability of all the 3 children be same gender The children can be all 3 girls or all 3 boys. The probability of getting a boy = 1/2 The probability of getting a girls = 1/2 Probability of getting 3 girls = 1/2 * 1/2 * 1/2 = 1/8 Probability of getting 3 boys= 1/2 * 1/2 * 1/2...
- by niazsna786
Mon Apr 04, 2011 6:42 pm- Forum: Problem Solving
- Topic: Probability
- Replies: 35
- Views: 22904
1. provinces and states with higher stringent car safety requirements have more accidents. 2. Safety experts agree more stringent requirements reduce the accident rates. which on the following, if true, supports the experts ? A. This is not related to the passage. INCORRECT B. The point is not bout ...
- by niazsna786
Tue Mar 29, 2011 2:23 am- Forum: Critical Reasoning
- Topic: Car Safety Requirement
- Replies: 43
- Views: 25477
The answer is very clear A
With 2 we can say value of r can be 0 1 2 3 4 5 6 or 7
but with 1 we can say for sure it is 0
i.e.
n = 1 expr (1-1)/8 , r= 0
n = 3 expr (9-1)/8, r= 0
n = 5 expr (25-1)/8, r= 0
hence answer is A 
- by niazsna786
Wed Mar 23, 2011 4:29 am- Forum: Data Sufficiency
- Topic: Remainder Prob
- Replies: 74
- Views: 40056
B looks correct to me .
for j = 1 given in 2.
the equation can 81, 801, 8001, 80001.... so on. what ever be the value of 'k' the expression is divisible by 9(sum of the digits always remain 9)
with only k = 13 we cannot be sure.
- by niazsna786
Wed Mar 23, 2011 4:08 am- Forum: Data Sufficiency
- Topic: Integer Properties - DS
- Replies: 102
- Views: 44434