Question

The mean of the following is 6.8. Find the missing frequency ‘a’ [4]
x 5 6 7 8 9 10
f 4 a 6 4 2 1


plz ans fast

Answer 1

Step-by-step explanation:

The mean of the following frequency distribution is 16, find the missing frequency

Class

0-4

4-8

8-12

12-16

16-20

20-24

24-28

28-32

32-36

Frequency

6

8

17

23

16

15

4

3

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Correct option is

A

8

Mean =16

Mean =

∑Frequency

∑(Mean)(Frequency)

16=

92+x

(12+48+170+322+288+330+120+10)

16x+1472=1392+26x

10x=80

x=8

Missing frequency is 8.

Answer 2

Answer:

Step-by-step explanation: