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https://web2.0calc.com/questions/cphill-help-the-multiplication-principle-in-counting

 Apr 4, 2020
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My classroom has 11 rows of chairs, with 11 chairs in each row. The chairs in each row are numbered from 1 to 11. How many chairs have odd numbers?

 

We  have   11 * 11  = 121 chairs

 

So....the number of  "odd" ones  =  120/2 + 1 =   60 + 1  =    61

 

cool cool cool

 Apr 4, 2020

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