Question

in examination, 400 students are appeared. if 2/3 of boys and all 130 girls are pass in examination.. then find how many boys failed in examination..??

Answer 1

Total number of students appeared: 400
Number of girls (all passed) : 130
Total number of boys appeared : 400-130
                                                   =270
Given,
2/3 boys passed
Then,
1/3 students falied

Boys failed in examination: 1/3×270
                                            90

Answer 2

$\huge\fbox{\color{yellow}{Answer}}$

Total Students = 400

Total Girls = 130

Passed Girls = 130

Total boys = 400-130 = 270

Passed boys = $\frac{2}{3} \times 270 = 180$

Boys failed = 270 - 180 = 90

Hence, 90 boys failed in examination.