Question

Problem No. 6 Tamsin is saving up for a smartwatch and puts all of her 50 cent and 20 cent coins in a jar each night. She thinks that she has saved enough and empties the 620 coins to count the money. 286 of the coins are 50 cent. If the cost of the smart watch is €230, how much more must she save to allow her buy the watch?

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Answer 1

Answer: She must save €230 - €209.8 = €20.2 more to buy the watch.

Explanation:

Tamsin has saved 286 * €0.50 = €143 from 50 cent coins.

The remaining coins are 620 - 286 = 334 which are 20 cent coins

So the total amount she has saved from 20 cent coins is 334 * €0.20 = €66.8

Therefore, the total amount she has saved is €143 + €66.8 = €209.8

So she must save €230 - €209.8 = €20.2 more to buy the watch.