Question

The average of the following five numbers is
8. Find the missing number in 7,5,?,3,12.
(A) 14
(B) 8
(C) 13
(D) 12
(E) None of these​

Answer 1

Answer:

13

Step-by-step explanation:

Average = Total/No. of observations

Let the missing number be x

Total = 7+5+x+3+12

= 27+x

Average = 27+x/5

8 = 27+x/5

40 = 27+x

x = 13

Answer 2

Answer:

Step-by-step explanation:

13

Step-by-step explanation:

Average = Total/No. of observations

Let the missing number be x

Total = 7+5+x+3+12

= 27+x

Average = 27+x/5

8 = 27+x/5

40 = 27+x

x = 13