Of 80 students, 34 play football and 51 play tennis. 12 do both. How many do neither?
Answer and explanation
Correct answer: C. 7
- Step 1: At least one = 34 + 51 - 12 = 73. Step 2. Neither = 80 - 73 = 7. Answer: 7. Why not the others: 5, 11 and 73 each come from skipping the overlap or the 'neither' group in the working.
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