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December 21, 2014

December 21, 2014

Posted by **DEE** on Saturday, January 19, 2013 at 7:17pm.

34 said they drove alone.

24 rode in a carpool.

28 rode public transportation.

3 used both carpools and public transportation.

3 used both a carpool and sometimes their own cars.

5 used buses as well as their own cars.

1 used all three methods.

How many used none of the above-mentioned means of transportation?

- Math 104 -
**Reiny**, Saturday, January 19, 2013 at 9:39pmNumber(A OR B OR C)

=NUMBER(A) + NUMBER(B) + Number(C) - Number(A AND B) - Number(A OR C) - Number(B AND C) + Number(A AND B AND C)

= 34+24+28 - 3 - 3 - 5 + 1

= 76

So 24 are not accounted for, they must have used none of the above

You could also use Venn diagrams

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