Question

of the 132 examinees of a certain School the ratio of an successful and unsuccessful students is 9: 2
if 4 more students passed what would have be the ratio of a successful and unsuccessful students

Answer 1

total no. of students = 132

let rach ratio student = x students

successful students are 9x.

unsuccessful students are 2x.

9x+2x=132

11x=132

x=12

successful students are 9×12=108

unsuccessful are 2 ×12=24

if 4 more students pass ,

then total no. of pass students are=112

ratio=112:20=

28:5