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 25%
C 13%
D 12.5%

Correct Answer: 12.5%

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%
Bissoy MCQ
#গণিত #শতকরা (Percentage) #National Bank Ltd #National Bank Ltd - Management Trainee Officer - 28.05.2010

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