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A class of 30 students was asked what they did on their winter holiday.
20 students said that they went skating.
9 students said that they went skiing.
Exactly 5 students said that they went skating and went skiing.
How many students did not go skating and did not go skiing?

 Jun 17, 2020
 #1
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5 people are in the middle.

 

Thus 20-5 only went skating, 9-5 only went skiing.

 

30 -5 - 15- 4 = 6

 

Thus 6 people did neither.

 

If you don't understand anything feel free to ask!

 Jun 17, 2020

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