Question

4. If the mean of the observations 10, 11, 15, 28, 20 and a is 17. Find
the value of a.​

Answer 1

Answer: 18

Step-by-step explanation:

mean = 17

n = 6

submission x = 10 + 11 + 15 + 28 + 20 + a

= 84 + a

so

mean = submission a/n

or, 17 = 84+a/6

or, 17*6 = 84+a

or, 102 = 84+a

or, 102-84 = a

so, a =  18

Therefore, the value of a is 18