George buys some first class and second class stamps to put on some letters. Each first class stamp costs 67p, and each second c
lass 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?
1 answer:
Answer:
£191.36
Step-by-step 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
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