GRE MATHS PROBLEM SOLVING-4
GRE Problem Solving Sample Questions Samples
GRE Problem Solving Sample Questions 1 | GRE Problem Solving Sample Questions 2 | GRE Problem Solving Sample Questions 3 | GRE Problem Solving Sample Questions 4 | GRE Problem Solving Sample Questions 5
1.Question
There are four balls of different colours and four boxes of the same four colours. The balls
have to be put in the boxes of matching colours. Find the probability that all the four balls are not put in
the right box.
A. 1/2
B. 6/24
C. 1/6
D. 23/24
E. 2/3
Correct
Answer: D
2.Question
What is the probability that a two digit number chosen at random will
be a multiple of 3 and not of 5?
A. 30/90
B. 24/90
C. 48/90
D. 13/90
E. 45/90
Correct Answer: B
3.Question
An experiment succeeds twice as often
as it fails. What is the probability that in the next 5 trials there will be 4 successes?
A. 1/243
B. 10/243
C. 4/243
D. 20/243
E. 80/243
Correct Answer: E
4.Question
An anti aircraft gun can fire 4 shots at a time. If the probabilities of the 1st, 2nd 3rd
and last shot hitting the enemy aircraft are 0.7, 0.6, 0.5, 0.4. What is the probability that at least one
of the four shots aimed at the enemy aircraft will hit the target?
A. 0.054
B. 0.126
C. 0.036
D. 0.084
E. 0.964
Correct Answer: E
5.Question
Find
the probability that in a group of 3 people no two have the same birthday assuming that a year has 365 days.
A. 1/365
B. 364*363/365^2
C. 364^2/365^2
D. 364^3/365^3
E. 365*364*363/365^2
Correct Answer: B
GRE Problem Solving Sample Questions Samples
GRE Problem Solving Sample Questions 1 | GRE Problem Solving Sample Questions 2 | GRE Problem Solving Sample Questions 3 | GRE Problem Solving Sample Questions 4 | GRE Problem Solving Sample Questions 5