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There are 20 people in my club. 8 of them are left-handed. 15 of them like jazz music. 2 of them are right-handed and dislike jazz music. How many club members are left-handed and like jazz music?

Guest Feb 27, 2015

Best Answer 

 #2
avatar+93683 
+5

I did this with a 3 by 3 grid - not including headings    (like a times table grid)

The headings along the top are left right and total

The headings down the side are like jazz, dislike Jazz and total

Then i filled in what I was given and worked out the rest.   

Melody  Feb 28, 2015
 #1
avatar+90027 
+5

12 are right-handed

Of these....2 dislike jazz

So.....10 must like jazz

And since 15 total like jazz....5 of those must be left-handed

 

  

CPhill  Feb 27, 2015
 #2
avatar+93683 
+5
Best Answer

I did this with a 3 by 3 grid - not including headings    (like a times table grid)

The headings along the top are left right and total

The headings down the side are like jazz, dislike Jazz and total

Then i filled in what I was given and worked out the rest.   

Melody  Feb 28, 2015

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