Question

7. The mean of 5 observations is 10. If mean of first three observations and that of last
three is 11 , find third observation​

Answer 1

Answer:

16

Step-by-step explanation:

let the numbers be a,b,c,b,e

Given

a+b+c+d+e=50. (1)

a+b+c=33. (2)

c+d+e=33. (3)

(3)+(2) gives

(a+b+c+d+e)+c=66

comparing it with (1) we get

50+c=66

c=16