Question

Out of a group of 150 students, 1/6 opted for science stream. 1/5 of the science students chose to study mathematics. How many science students want to study mathematics? ​

Answer 1

$number \: of \: students = 150 \\ \\ \frac{1}{6} \: opted \: for \: science \\ \\ \frac{1}{5} of \: the \\science\: students \: \\ chose \: mathemtics \\ \\ number \: of \: students \: who \\ chose \: science \\ \\ = \frac{1}{6} \: of \: \: 150 \\ = 25 \\ \\ number \: of \: science \: students \: \\ who \: chose \: maths \\ = \frac{1}{5} of \: 25 \\ = 5 \\ \\ 5 \: science \: students \: chose \: maths \: as \: their \: subject$