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primary 6 | Maths
| Data Analysis
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Pls explain detailed I'm a dum dum.
Date Posted: 5 years ago
Views: 317
Let's assume there are 60 10-cent coins. The total will be 60 * $0.1 = $6.
We are still lacking $22 - $6 = $16 which is our goal for this question.
For every 10-cent coin we change to 50-cent, the total will increase by $0.4 per coin changed.
$16 / $0.4 = 40, so there are 40 50-cent coins, and 20 10-cent coins.
The answer is 40.
We are still lacking $22 - $6 = $16 which is our goal for this question.
For every 10-cent coin we change to 50-cent, the total will increase by $0.4 per coin changed.
$16 / $0.4 = 40, so there are 40 50-cent coins, and 20 10-cent coins.
The answer is 40.
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Assumption method. Another method is guess and check method. Assumption method is the fastest way to get the answer. There are steps by steps video presentation from https://youtu.be/Lr2g15hki9E that you can learn how to solve the above question.
Date Posted:
5 years ago
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