Question

The mean of 5 observations is 15. If mean of the first three observations is 14 and that
of the last three observations is 17, find the third observations​

Answer 1

Answer:

c=18

Step-by-step explanation:

a+b+c+d+e=(15×5)=75

a+b+c=(14×3)=42

c+d+e=(3×17)=51

c=?

take a+b+c+d+e=75

wkt,a+b+c=42

so, 42+d+e=75

d+e=75-42

d+e=33

wkt,c+d+e=51

so,c+33=51

c=51-33

c=18