Question

105 visitors purchased no costume. 41 visitors purchased exactly one costume. 8 visitors purchased more than one costume. Based on these results, express the probability that the next person will purchase one or more costumes as a decimal to the nearest hundredth.

Answer 1

Probability is 0.32

Explanation:

The info we have is 105 people bought nothing. 41 + 8, that is 49 people bought something. That makes a total of 154 people. The total goes on the bottom of a fraction (to find the probability)

So far, we have

?/154

Probability of "buy something is:

49/154

(because the data shows that 49 out of 154 people bought something)

Let's use a calculator and divide 49÷154

We get 0.3181818...

(if you are not allowed to use a calculator, reduce 49/154 to 7/22 and use long division to get 0.3181818...)

The question asks for the nearest hundredth, that's two decimal places.

Probability is 0.32