GRE Exam Numerical Ability Probability

Meena has to eat only one fruit out of three. The probability that she eats a banana is 3/2 times the probability that she eats an apple. The probability that she eats a guava is half the probability that she eats a banana. What is her probability of having an apple?

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GRE Other Question

A box contains 6 red, 4 white and 5 black balls. A person draws 4 balls at random. Find the probability that among the four balls, there is at least one of each colour. Find f(x)-1/f(x), when f(x) = (x+1)/(x-1)? Indicate all correct options. [n^2 = n*n]
A. 2
B. 2/(x^2-1)
C. 4x/(x^2-1)
D. 4x/[(x+1)(x-1)]
E. 2(x^2+2x-1)/(x^2-1)