Question

PROBLEM SOLVING You and your friend are among several candidates running for class president. You estimate that there is a 45% chance you will win and a 25% chance your friend will win. What is the probability that you or your friend win the election? The probability that you or your friend win the election is _%.

Answer 1

`\begin{gathered} p(i)=0.45 \\ p(y)=0.25 \end{gathered}`
`p(i\text{ or y)=p(i)+p(y)}`
`\begin{gathered} p(i\text{ or y)}=0.45+0.25 \\ p(i\text{ or y)}=0.7 \end{gathered}`

it is therefore 70 % that you or your friend win the election.

Note

45% = 0.45

25% = 0.25