GRE Exam Numerical Ability Probability

A certain experiment has three possible outcomes. The outcomes are mutually exclusive and have probabilities p, p/2 and p/4 respectively. What is the value of p ?
(A) 1/7
(B) 2/7
(C) 3/7
(D) 4/7
(E) 5/7

Read Solution (Total 2)

The sum of all possible outcomes is 1.
then p+p/2+p/4=1
7p/4=1
p=4/7
9 years agoHelpfull: Yes(1) No(0)

d i thibnk it has to be divisble by 7
8 years agoHelpfull: Yes(0) No(0)

GRE Other Question

In triangle ABC, the measure of angle B is 90°, the length of side AB is 4, and the length of side BC is x. If the length of hypotenuse AC is between 4 and 8, which of the following could be the value of x ? Indicate all such values.
(A) 1
(B) 2
(C) 3
(D) 4
(E) 5
(F) 6 If an integer is divisible by both 8 and 15, then the integer also must be divisible by which of the following?
(A) 16
(B) 24
(C) 32
(D) 36
(E) 45