Question

If 7 is the mean of 3 6 a 9 and 10. Find the value of a

Answer 1

Answer:

a = 7

Step-by-step explanation:

Mean = 7

Total of terms = (3+6+a+9+10) = 28+a

No. of terms = 5

Mean = Total of terms / No. of terms

7 = (28+a)/5

7×5 = 28 + a

35 = 28 + a

35 - 28 = a

a = 7