Question

Frankie has some stamps.
She spends £9.90 on 20p and 50p stamps.
She buys twice as many 20p stamps as 50p stamps.

How many 20p stamps did she buy?

Answer 1

Answer:

22

Step-by-step explanation:

Cost of stamps- 20p & 50p

Total cost-  £9.90

Number of stamps-?

Number of 20p stamps is twice as number of 50p stamps so for each 50p another 40p spent for a total of 3 stamps.

Each 3 such number is equivalent of 2*20p+50p=90p

And there are £9.90/90p=11 number of 90p's fit in total price.

So total number of stamps=11*3=33

Amount of 20p stamps=2/3 of 33 = 22

Hope it helps.

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