Question

Q 11. Find the missing age X if the mean age for the following series is 60 years.
85
60
X
75
55
Age (in years)
40
70
65​

Answer 1

Answer:

x=30

Explanation:

(85+60+x+75+55+40+70+65)/8=60

=> 85+60+x+75+55+40+70+65=60*8

=>x=480-(85+60+75+55+40+70+65)

=> x=480-450

=> x=30

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