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Last Updated on May 5, 2023
GMAT OFFICIAL GUIDE DS
Solution:
We need to determine the probability that a boy will be selected to read, in a class of boys and girls.
Statement One Alone:
Two-thirds of the students in the class are boys.
Since we know that 2/3 of the class are boys, we know that the probability of randomly selecting a boy to read is 2/3. Statement one alone is sufficient to answer the question. We can eliminate answer choices B, C, and E.
Statement Two Alone:
Ten of the students in the class are girls.
Without knowing the number of boys in the class, we cannot determine the probability that a boy will be selected to read. Statement two alone is not sufficient to answer the question.
Answer: A
