Maths - Help

tejal · Post by **tejal** » Fri Aug 03, 2007 4:58 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?

Guest55 · Post by **Guest55** » Fri Aug 03, 2007 5:13 pm

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

tejal · Post by **tejal** » Fri Aug 03, 2007 5:15 pm

Thank you.

yoyo123 · Post by **yoyo123** » Fri Aug 03, 2007 5:55 pm

where did they find all these boys who washed???

Guest · Post by **Guest** » Sat Aug 04, 2007 11:26 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!!!!!!!!!!!!!!

Guest · Post by **Guest** » Sat Aug 04, 2007 6:17 pm

Would this not be easier to see using a Venn Diagram?

Guest55 · Post by **Guest55** » Sat Aug 04, 2007 6:47 pm

Yes it would but I don't know how to draw one on here! Not all schools seem to do them either