Question

The mean of three numbers is 20 and the mean of other four numbers is 26. Find the mean of all the Numbers​

Answer 1

Answer:

Mean = 15.42

Step-by-step explanation:

Given that

Mean of 3 numbers =20.

⇒20 = Sum of 3 observations / 3

⇒ Sum of 3 observation = 60...(1)

Also given that

Mean of other 4 numbers = 26

⇒12 = Sum of 4 observations / 4

⇒ Sum of 4 observation = 48...(2)

From equation (1) and (2), we get

Sum of 7 observation = 60+48=108

∴ Mean = Sum of 7 observations / 7

Mean = 108/7

Mean = 15.42

Answer 2

Answer:

first 21 ,19 and 10

second 26 , 24 , 32 and 22

the mean of all the numbers are :- 22