A is the answer because it is the widest variety
Answer:
I think it would be
Sums
1) a + -5
2) m + -n
Differences
1) 7 - -3
2) a - -5
Step-by-step explanation:
Answer:
a = 12 and b = 18
Step-by-step explanation:
Given that,
8,a,b,27 are in geometric sequence.
For a GP, the nth term is given by :

Put n = 4

Put n = 2,

Put n = 3

So, the values of a and b is 12 and 18 respectively.
Add them all up and divide by the number of blue bars