Answer:
The average or expected number of students to have participated in after- school sports all four years of high school is;
[tex]3.2\text{ seniors}[/tex]Explanation:
Given that 7% of students at a local high school participate in after-school sports all four years of high school.
[tex]P=7\text{\% = 0.07}[/tex]If a group of 45 senior is randomly selected.
[tex]N=45[/tex]The average or expected number of students to have participated in after- school sports all four years of high school will be;
[tex]\begin{gathered} n=P\times N \\ n=0.07\times45 \\ n=3.15 \\ n=3.2\text{ - to 1 decimal place} \end{gathered}[/tex]Therefore, The average or expected number of students to have participated in after- school sports all four years of high school is;
[tex]3.2\text{ seniors}[/tex]