Question

If the mean of 5, 7, 9, 12, 5, 13, a, 10 is 8 then find the value of a.

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Answer 1

Answer:

3

Step-by-step explanation:

Mean = sum of observations/ number of observations

8 = ( 5 +7 + 9 + 12 + 5 + 13 + a + 10 ) / 8

8 x 8 = 61 + a

64 = 61 + a

64 - 61 = a

3 = a

a = 3

Answer 2

Answer:

a = 3

Step-by-step explanation:

Mean= 5+7+9+12+5+13+a+10/8

8 = 61+a/8

8×8 = 61+a

64 = 61+ a

a = 64-61

a = 3