Question

a,a+3,a+6,a+9 and a+12 avrage of these numbers is 10 then find the value of a=?
A)1
B)2
C)3
D)4​

Answer 1

Answer:

average of a,a+3,a+6,a+9,a+12 is

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

=(5a+30)/5

=5(a+6)/5

=a+6

so,

a+6=10

=> a=10-6

=> a=4

so, (d) is the correct answer

Answer 2

Answer:

4

Step-by-step explanation:

A/ Q : -

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

=> 5a + 30 = 10 × 5

=> 5a = 50 - 30

=> 5 a = 20

=> a = 4