Question

3. A dealer buys some pen
from a wholesaler at the rate
of rupees 30per pen and
mark them at 40 ezen how
much discount he should
allowed to get a profit of
20%​

Answer 1

In the given AP, we have a = 3 and d = 8 – 3 = 5

Suppose there are n terms in given AP, then

Tn  =  a + (n-1) d = 88

⇒ 3 + (n-1) 5 = 88

⇒ 3 + 5n – 5 = 88

⇒ 5n = 90

⇒  n = 12

Hence, the 18th term of given AP is 88