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1. A class of 120 has 25% girls. If 10% of the boys and 20% of the girls attended a picnic then what percentage of the class attended the picnic?
- A. 20%
- B. 20%
- C. 20%
- D. 20%
Answer: Option D
Explanation:
Total students = 120
number of girls = 120*25% = 30
number of boys = (120 - 30) = 90
munber of students attended picnic = 90*10% + 30*20% = 6 + 4 = 15
% of students attended picnic = 15/120*100 = 12.5
ans: 12.5%
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