Find the number of terms in the following series.
30, 35, 40, 45, ............, 100
Show answer & explanation
Correct answer: B
Explanation
Series = 30, 35, 40, 45, .........., 100
Number of terms in AP
n = (last term − first term) / common difference + 1
First term (a) = 30
Common difference (d) = 35 − 30 = 5
Last term (l) = 100
n = (100 − 30) / 5 + 1
= 70 / 5 + 1
= 14 + 1
= 15