Table: Participants in a regional review session — Region I 120, Region II 80, Region III 200, NCR 400. How many more participants came from NCR than from Regions I and II combined?

Correct answer: A. 200

Regions I and II together had 120 + 80 = 200. NCR had 400, so it had 400 − 200 = 200 more. Combine first, then subtract.

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Answer and explanation

The correct answer is A. 200

Regions I and II together had 120 + 80 = 200. NCR had 400, so it had 400 − 200 = 200 more. Combine first, then subtract.