Question

If an denotes the nth term of the AP 3, 8, 13, 18, … then what is the value of (a₃₀ - a₂₀)?

(a) 40 

(b) 36 

(c) 50 

(d) 56

Answer 1

Correct answer is (c) 50

The given AP is 3, 8,13,18....

Here, a = 3 and d = 8 - 3 = 5

Thus, the required value is 50.