Question

. If Arithmetic mean of a, a+3, a+6, a+9 and a+12 is 10, then a is equal to;-

1 point

1

2

3

4​

Answer 1

Answer:

4

Step-by-step explanation:

(a + a+3 + a+6 + a+9 + a+12 )/ 5 = 10

5a + 30 = 10*5

5a = 50-30

a = 20/5

a= 4

I hope this will help yoy