A poll was taken of 100 students at a commuter campus to find out how they got to campus. The results were as follows:

29 said they drove alone.
25 rode in a carpool.
30 rode public transportation.
7 used both carpools and public transportation.
6 used both a carpool and sometimes their own cars.
8 used buses as well as their own cars.
5 used all three methods.
How many used none of the above-mentioned means of transportation?

6 answers

What did you find in your Venn Diagram?
that the answer is 47 is that right?
check my reply to this post
http://www.jiskha.com/display.cgi?id=1382280503

It is the same question, only the numbers have been changed. Follow the same method
ok i will but i guess 47 was wrong?
we could do it this way:

number(alone or carpool or public)
= 29 + 25+30 - 7 - 6 - 8 + 5
= 68

so number without any of those = 100 - 68 = 32
Thank you I like and understand this way better