Of 60 students, 34 play football and 26 play tennis. 21 do both. How many do neither?
Answer and explanation
Correct answer: A. 21
- Step 1: At least one = 34 + 26 - 21 = 39. Step 2. Neither = 60 - 39 = 21. Answer: 21. Why not the others: 0, 23 and 39 each come from skipping the overlap or the 'neither' group in the working.
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