The fourth term of an Arithmetic Progression (A.P) is 37 and the first term is -20. Find the common difference.
A
3
B
57
C
19
D
17
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
a + 3d = 37
-20 + 3d = 37
3d = 37 + 20 = 57
d = \(\frac{57}{3}\)
= 19
Source: Myschool Past Questions Archive (Record #57382)