The mean mark in statistics of 100 students in a class was 72. The mean mark of boys was 75, while their number was 70. The mean mark of girls in the class was

see full answer

Take the SCORE scholarship exam from home and compete for scholarships worth ₹1 crore!*

An Intiative by Sri Chaitanya

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

Mean mark of girls in the class was = 70×75+30×x100=72⇒x=65

Watch 3-min video & get full concept clarity