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There are 47 people attending a play at an outdoor theater. There are 11 groups of people sitting in groups of 3 or 5. How many groups of each size are there?​

 Mar 17, 2020
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Thanks for the A2A.

 

We can solve this problem by assuming.

 

If all of the groups are groups of 3, then there will be 33 people.

 

5 - 3 is 2.

 

Because we are 14 people behind, there are 14/2 groups of 5. 

 

That is, 7 groups of 5 and therefore, 4 groups of 3. 

 

Cheers!

 Mar 17, 2020

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