SSAT Math Question 654: Answer and Explanation

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Question: 654

9. Students in Mr. Greenwood's history class are collecting donations for a school charity drive. If the total number of students in the class, x, donated an average of y dollars each, in terms of x and y, how much money was collected for the drive?

  • A.
  • B. xy
  • C.
  • D.

Correct Answer: B

Explanation:

There are variables in the choices, so Plug In here. Say there are 20 students in the class, so x = 20. If each donates an average of $3, y = 3. Next, find the total amount of money donated: 20 × 3 = 60. This is the target answer. Now, Plug In your values for x and y to see which choice yields the target (60). Eliminate (A) because is not an integer and is much too small. Choice (B) works because (20)(3) = 60. Eliminate (C) because = = 3, which is too small. Cross off (D) since it equals , and (E) is way too large: (2)(20)(3) = 120. The correct answer is (B).

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