Question

In an examination, 400 students appeared. If 2/3 of the boys and all 130 girls were passed in examination, then find how many boys failed in examination?

Answer 1

Given

Number of students appeared exams =400

(2/3) of total boys and all 130 girls passed in the examination

Hence,

Number of total boys =400−130

=270

Number of boys passed =(2/3) of 270

=(2/3)×270

=180

So, number of boys failed =270−180

=90

Hence, 90 boys failed in an examination

Answer 2

Total number of students = 400

Number of girls = 130

Number of boys = 400 - 130 = 270

Number of boys who passed = 2/3 x 270 = 180

Number of boys of failed = 270 - 180 = 90

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