GRE
Exam
Numerical Ability
Probability
Sofia and Tess will each randomly choose one of the 20 integers from 1 to 20. What is the probability that neither integer chosen will be square of the other ?
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GRE Other Question
A certain jar contains 70 jelly beans — 23 white, 27 green, 11 yellow, 5 red and 4 purple. If a jelly bean is to be chosen at random, what is the probability that the jelly bean will be neither red nor purple?
When 9 students took a biology quiz with a possible score of 0 to 10, inclusive, there average (arithmetic mean) score was 7.5. If a tenth student takes the same quiz, what will be the least possible average score on the quiz for all 10 students?