1. ## word problem help

120 students were asked about skiing. Here are the results of the poll:
1. Have you skied either cross-country or downhill? Yes: 65 No: 55
2. If you answered Yes to Question 1, did you ski downhill? Yes: 28 No: 37
3. If you answered Yes to Question 1, did you ski country-country? Yes: 45 No: 20
How many students skiied both cross-country and downhill?

I'm not sure why it is 8?

2. Originally Posted by mjoshua
120 students were asked about skiing. Here are the results of the poll:
1. Have you skied either cross-country or downhill? Yes: 65 No: 55
2. If you answered Yes to Question 1, did you ski downhill? Yes: 28 No: 37
3. If you answered Yes to Question 1, did you ski country-country? Yes: 45 No: 20
How many students skiied both cross-country and downhill?

I'm not sure why it is 8?
Use a Venn-diagram.

3. I'm still kinda of lost why we use those values in the circles..

4. I still don't see why

5. Originally Posted by mjoshua
I still don't see why
Hi mjoshua,

That's the beauty of Venn diagrams. They tell the story visually.

You have a total of 65 people who have skied.

28 of them have skied downhill and 45 of them have skied cross-country.