Question

The mean of the number 10, 20, 30 and 40 is
(a) 50
(b) 25
(C) 30
(d) 20​

Answer 1

Step-by-step explanation:

ANSWER

Class Interval frequency (fi) Mid value fixi

0-10 12 5 60

10-20 16 15 240

20-30 6 25 150

30-40 7 35 245

40-50 9 45 405

N=∑fi=50 ∑fixi=1100

∴Mean=

∑fi

∑fixi

=

50

1100

=22

Answer 2

Answer:

25

Step-by-step explanation:

Mean : 10 + 20 + 30 + 40

4

100

4

Ans : 25