Question

1. Marks obtained by 9 students are given below:-
60, 67,52, 76,50, 51, 74, 45 and 46
a. Find the Arithmetic mean
b. If Marks of each student be increased by 4, what will be the new value of Arithmetic mean.
2. Find the mean of :-
30-40
40-50​

Answer 1

Answer:

mean=60+67+52+76+50+51+74+45+46