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3 years ago

There are a total of 96 children in Years 4, 5 and 6

Mathematics

1 answer:

BaLLatris [955]3 years ago

7 0

Answer: 20 children

Step-by-step explanation:

Given

Year 4: 11 cannot swim

Year 5: 21 can swim

Year 6: 18 of 30 can swim

Total 96 children

Total 37 cannot swim

First Step: find the number of people from year 5 who cannot swim

There are 30-18=12 people who cannot swim in year 6
There are 11 who cannot swim in year 4
Thus, we use the total number [37]-[year 4+year 6]=37-23=14 people who cannot swim in the year 5

Second Step: find the number of children in year 5

There are 21 children who can swim
There are 14 children who cannot swim
21+14=35 children

Third Step: find the number of children in year 4 who can swim

There are 30 children in year 6
There are 35 children in year 5
There are 11 children in year 4 who cannot swim
There are in total 96 children
96-30-35-11=20 children in year 4 who can swim

Hope this helps!! :)

Please let me know if you have any questions

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