geometery

posted by carol

please walk me through this I am having a hard time with this

A survey of 500 showed the following
140 had camping and hiking trails
Determine the
a) number of parks that had at least one of the features

1. Steve

If we label the pats of the circles in our Venn diagram,

15+CH+CP+CHP = 185
CH+CHP = 140
CP+CHP = 125
20+CH+CHP+HP = 210

from these we can see that

CH = 45
CP = 30
HP = 50
CHP = 95

a) sum of them all is 290
b) CHP = 95

Similar Questions

3. College Mathematics

A survey of 300 parks showed the following 15 had only camping 20 had only hiking trails 35 had only picnicking 185 had camping 140 had camping and hiking trails 125 had camping and picnicking 210 had hiking trails Find the number …
4. chemistry

If you had walked into the lab, only to discover that you only had 0.1 M sulfuric acid available to run your tests, how might this have affected your calculations?
5. math

The Wildlife Federation surveyed 170 San Diego residents. The results are as follows: 26 had a membership to the Birch Aquarium 44 had a membership to the San Diego Zoo 17 had both construct a venn diagram answering the foloowing questions …
6. Math

14. Parks A survey of 300 parks showed the following. 15 had only camping. 20 had only hiking trails. 35 had only picnicking. 185 had camping. 140 had camping and hiking trails. 125 had camping and picnicking. 210 had hiking trails. …
7. geometry

A survey of 500 showed the following 15 had only camping 20 had only hiking trails 35 had only picnicking 185 had camping 140 had camping and hiking trails 125 had camping and picnicking 210 had hiking trails Determine the number of …
8. Probability

CHECK ANSWERS PLEASE ********************************** Paula asked 30 students what they ate for lunch. All the students had at least a sandwich, salad or fruit. ********************************* QUESTION A Draw a Venn Diagram. * …