How many 25 cent stamps are there?

Question

A man has a collection of stamps made up of 25 cent stamps and 40 cent stamps.There are four times as many 25 cent stamps as 40 cent stamps.If the total value of the stanps is P22.20, fins how many 25 cent stamps are there?

Answer 1

Let x=number of 40c stamps, then 4x is the number of 25c stamps.

Total value of 40c stamps is 40x cents, and the total value of 25c stamps is 4x × 25c=100x cents.

So 40x+100x=2220 cents. x=2220/140=111/7 which is a mixed number=15⁶⁄₇.

Let’s assume x is 16, then there are 16 40c stamps and 64 25c stamps, totalling 6.40+16.00=P22.40.

If x=number of 25c stamps and 4x the number of 40c stamps total value is 0.25x+1.60x=1.85x=22.20, making x=12.

Perhaps this is the way the question is to be read, so there would be 12 25c stamps and 48 40c stamps, totalling 3.00+19.20=P22.20.