Question

The marks obtained by ten students in mathematics are given
below. Calculate simple arithmetic mean by short-cut method :
Roll No.
1
2
3
4
5
6
7
8
9
10
Marks
43
48
65
57
31
60
37
48
78
59

Answer 1

Answer:

bro what we do this question plz say me

Answer 2

Answer:

43+48+65+57+31+60+37+48+78+59/10

Ans is 472.9