Question

in an examination 90% of students passed out of 150 students.find the number of students failed in examination

Answer 1

as 90% students who passed
10% students failed
thus no. of students who failed are
=10×150/100
=15

Answer 2

90% passed in exam out of 150
that means 90/100×150
that is 135 students passed in exam
fail =150-135
that is 15