Question

If 4, a, b, 28 are in Arithemetic progression then the value of 'b'is
A. 20
B. 19
C. 23
D. 12​

Answer 1

Answer:

a

Step-by-step explanation:

2a = 4+b

28+a=2b

2 equation 2 unknown

Answer 2

Answer:

Heya

Step-by-step explanation:

a(first term) =4

l(final term) =28

By using formulae(l=a+(n-1)d):

28=4+3d

d=8

a=a+d=12

b=a+2d=20