Posted by **Matt** on Monday, October 29, 2007 at 4:58pm.

A survey of one thousand people found that 70% of the people have a

CD player, 85% have a telephone, and 45.2% have a computer. At

least how many people have all three objects?

Is the answer 152?

- Calculus Check -
**bobpursley**, Monday, October 29, 2007 at 6:25pm
The minimum number will start with the 15 percent who do not have a telephone:

So 150 of 452 have a computer, but no telephone.

The next group has to be having a telephone and a computer, but not cd player.

300 do not have a cd player, so you can take these 300 and make them owners of a computer.

That leaves 2 people who have to have all three.

## Answer this Question

## Related Questions

- Calculus Check - A survey of one thousand people found that 70% of the people ...
- Calculus Help? - I have no idea where to start? A survey of one thousand people ...
- Calculus - A survey of one thousand people found that 70% of the people have a ...
- Cacluluc CHECK - A survey of one thousand people found that 70% of the people ...
- Statistics - Some IQ scores are standardized with a mean of 100 and a standard ...
- Math_Statistics - Some IQ scores are standardized with a mean of 100 and a ...
- MATH - URGENT!!! - 6 people are sitting around a table. Let x be the number of ...
- statistics - Suppose that in a large population the proportion of people that ...
- Math - An unusual die has six faces labelled 1,2,3,5,7 9. If two of these dice ...
- math - 100 people set up a phone call system so that the initial contact person ...

More Related Questions