Question

Devi buys 4 times as many pencils as Shilpa. If 30 pencils remained in the shop, which expression gives the number of pencils before the girls bought pencils?

• A. 5p + 30
• B. p + 30
• C. 4p + 30
• D. 5p - 30

Answer 1

The correct option is A

5p + 30

Let the number of pencils bought by Shilpa be $p$.
The number of pencils bought by Devi is $4p$.
Total number of pencils bought by the girls is $p+4p=5p$

The number of pencils remaining in the shop after the girls bought pencils is 30.
The total number of pencils in the shop before and after girls bought pencils is a constant value.

$\therefore \text{the required algebraic expression is}5p+30$