Question

5. if arithmetic mean of a,a+3,a+6a+9and a+12 is 10 then a is equal to?
a) 1
b) 2
c) 3
d)4​

Answer 1

4 is your answer .

Answer 2

Answer:

Step-by-step explanation:

[a+a+3+a+6+a+9+a+12]/5=10

5a+30=50

5a=20

a=4