Post a New Question

Calculus Check

posted by .

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 -

    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

First Name
School Subject
Your Answer

Related Questions

More Related Questions

Post a New Question