Question

Mitsugu has one quiz each week in math class. The table gives the probability of having a quiz on each day ofthe week. What is the probability that Mitsugu will have a quiz Wednesday, Thursday, or Friday? Express youranswer as a percent.

Answer 1

This is an or probability event. To find the probability of OR eventes, we use the formula:

`P(AorB)=P(A)+P(B)_{}`

Then, we need to add the probability of Wednesday, Thursday and Friday:

`0.05+0.15+0.51=0.71`

Now to convert this result in percentage, we multiply by 100:

`0.71\cdot100=71`

The correct answer is 71%