John saved 20c and 50c coins. When he reached 100 coins the amount totalled $40.40.What percentage of the coins were 50 cent coins?
Question
John saved 20c and 50c coins. When he reached 100 coins the amount totalled $40.40.What percentage of the coins were 50 cent coins?
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Solution 1
Let's denote the number of 20c coins as x and the number of 50c coins as y.
From the problem, we know two things:
- John has a total of 100 coins, so x + y = 100.
- The total value of all the coins is $40.40, or 4040c. Since each 20c coin is worth 20c and each 50c coin is worth 50c, we can also Knowee AI StudyGPT is a powerful AI-powered study tool designed to help you to solve study prob
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