Question

7. A test was given to 400 students of whom 150 were boys and the rest were girls. The boys
had an average score of 72 with S.D. 7, while the girls had an average score of 73 with S.D.
6.4. Find the mean and S.D. of the class as a whole.​

Answer 1

Answer:

Your ANSWER

MARK ME AS BRAINLIST ANSWER ❤❤❤❤❤❤❤