Question

A survey was done in Class 7 to find the amount of pocket
money each student got during a week. The data is given below.
Find the mean amount of pocket money students in Class 7 get
during a week.
Pocket money (Rs.)
10
20
30
40
50
No. of students
3
12
15
8
2​

Answer 1

Answer:

Let the heights (in cm) of 10 students of our class be

125, 127, 132, 133, 134, 136,138, 141, 144, 146

Highest value among these observations = 146

Lowest value among these observations = 125

Range = Highest value − Lowest value

= (146 − 125) cm

= 21 cm

Answer 2

Step-by-step explanation:

Mean = summation xi.fi/ summation fi