Question

George buys some first class and second class stamps to put on some letters. Each first class stamp costs 67p, and each second class stamp costs 58p. The ratio of first to second class stamps is 1:4. George bought 320 stamps. How much did George pay for all the stamps?

Answer 1

£191.36

Explanation:

Sum the parts of the ratio, 1 + 4 = 5 parts

Divide 320 by 5 to find the value of one part of the ratio.

320 ÷ 5 = 64 ← value of 1 part of the ratio , thus

4 parts = 4 × 64 = 256

Thus he bought 64 first class and 256 second class.

Cost = (64 × £0.67) + (256 × £0.58)

= £42.88 + 148.48

= £191.36