GRE Exam Numerical Ability Probability

One integer will be randomly selected from the integers 11 to 60, inclusive. What is the probability that the selected integer will be a perfect square or a perfect cube?
(A) 0.1 (B) 0.125 (C) 0.16 (D) 0.5 (E) 0.9

Read Solution (Total 1)

There are 50 integers between 11-60 , and there are 4 integers that are perfect square and 1 integer which is perfect cube.
Hence, probability = 5/50 = 0.1 (Option A)
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GRE Other Question

Tina, Edward, and Lauren agree to share the cost of a gift and to make their contributions in proportion to their ages. Edwards age is 1/2 of Tina’s age, and Lauren’s age is 1/3 of Edward’s age. If Lauren’s share of the cost is $ 2.50, what is the cost of the gift? Three solid cubes of lead, each with edges 10 centimeters long, are melted together in a level, rectangular-shaped pan. The base of the pan has inside dimensions of 20 centimeters by 30 centimeters, and the pan is 15 centimeters deep. If the volume of the solid lead is approximately the same as the volume of the molted lead, approximately how many centimeters
deep is the melted lead in the pan?