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primary 6 | Maths
| Data Analysis
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Date Posted: 5 years ago
Views: 391
Assumption method.
Assume all 50 packets are small.
Number of sweets = 50 x 5 = 250
Now we know the total number of sweets is 302. So we need to replace some of the small packets with big packets
When we replace 1 small packet (with 5 sweets) with 1 big packets (9 sweets), the total number of sweets increases by 4.
302 - 250 = 52
We need an increase in 52 sweets.
52 ÷ 4 = 13
So we need to replace 13 small packets with big packets.
This means that there are actually 13 big packets
So number of small packets
= 50 - 13
= 37
Assume all 50 packets are small.
Number of sweets = 50 x 5 = 250
Now we know the total number of sweets is 302. So we need to replace some of the small packets with big packets
When we replace 1 small packet (with 5 sweets) with 1 big packets (9 sweets), the total number of sweets increases by 4.
302 - 250 = 52
We need an increase in 52 sweets.
52 ÷ 4 = 13
So we need to replace 13 small packets with big packets.
This means that there are actually 13 big packets
So number of small packets
= 50 - 13
= 37
See 1 Answer
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This solution is based on the assumption that your child has learned algebra manipulation.
Date Posted:
5 years ago
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