In a certain school , 40% of the students are boys . If 20% of the boys and 10% of the girls went on a field trip, what percentage of the total students went to the field trip?

A 12%
B 14%
C 15%
D 30%

Correct Answer: 14%

Boys = 40% of the students Girls = 100 - 40 = 60% of the students Boys went to the field trip = 20% of 40% of students = 20/100 of 40% of students = 8% Girls went to the field trip = 10% of 60% of students = 10/100 of 60% of students = 6% Total students went to the field trip = 8% + 6% = 14%
Bissoy MCQ
#গণিত #শতকরা (Percentage) #Trust Bank Ltd #Trust Bank Ltd - Management Trainee Officer - 06.12.2011

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