Question

12. The masses in kg of 60 boys of a certain age were found to give the following distribution
Mass
35 -
40 -
45 -
50-
55-
65-
Number of boys
3
3
1
7
17.
13
10
6
Estimate the mean mass.
lays of 100 electricity tubes of a certain ma​

Answer 1

Answer:

in which class you are ?..