Mathematics for IGCSE & O level - Sets (Section 2 - No. 26)
In a class of 40 students, 20 play football, 15 play basketball, and 10 play both. How many students play only one of these sports?
15
25
30
40
Explanation
20-10 = 10 only Football, 15-10 = 5 only Basketball. 10 + 5 = 15
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