Search any question & find its solution
Question:
Answered & Verified by Expert
The mean weight of 150 students in a certain class is $60 \mathrm{~kg}$. The mean weight of boys in the class is $70 \mathrm{~kg}$ and that of girls is $55 \mathrm{~kg}$. What is the number of boys in the class?
Options:
Solution:
2194 Upvotes
Verified Answer
The correct answer is:
50
Number of students $=150$.
By aligation, ratio $=1: 2$
$\therefore$ No. of boys $=\frac{1}{3} \times 150=50$
By aligation, ratio $=1: 2$
$\therefore$ No. of boys $=\frac{1}{3} \times 150=50$
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.