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 Post subject: Maths - HelpPosted: Fri Aug 03, 2007 3:58 pm
A teacher asked a class of 25 boys whether they had taken a bath or shower. Eighteen boys had a shower, 10 had a bath and 3 had neither.

How many boys had taken both a bath and shower?

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 Post subject: Posted: Fri Aug 03, 2007 4:13 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11940
25 - 3 = 22. [get rid of the three who had neither]

22 boys had bath or shower or both.

18 + 10 = 28

But there's only 22 boys - so 6 boys [28 - 22 ]have been counted twice meaning they had both.

Hope this helps

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 Post subject: Posted: Fri Aug 03, 2007 4:15 pm
Thank you.

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 Post subject: Posted: Fri Aug 03, 2007 4:55 pm

Joined: Mon Jun 18, 2007 2:32 pm
Posts: 6966
Location: East Kent
where did they find all these boys who washed???

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 Post subject: Posted: Sat Aug 04, 2007 10:26 am
Ha ha.....................and did they change their pants and socks. It takes ages to persuade young son into a shower and then I have to hide his old pants and socks to prevent him putting them back on again. Something to do with comfort apparently!!!!!!!!!!!!!!

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 Post subject: Posted: Sat Aug 04, 2007 5:17 pm
Would this not be easier to see using a Venn Diagram?

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 Post subject: Posted: Sat Aug 04, 2007 5:47 pm

Joined: Mon Feb 12, 2007 1:21 pm
Posts: 11940
Yes it would but I don't know how to draw one on here! Not all schools seem to do them either

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