Question

At Thomas Jefferson High School, the student body is divided by age as follows: 7% of the students are 14, 22% of the students are 15, 24%of the students are 16, 23% of the students are 17, 19% of the students are 18, and the rest of the students are 19. Find the average age of the students at Thomas Jefferson High School.

Answer 1

Answer:

The average age of the students at the school is 16.4 years.

Step-by-step explanation:

To find the average age of the students at the school, we multiply each age by it's percentage.

We have that:

7% of the students are 14

22% of the students are 15

24% of the students are 16

23% of the students are 17

19% of the students are 18

The rest is 19

The rest is?

100-(7+22+24+23+19) = 100 - 95 = 5

So 5% of the students are 19

Find the average age of the students at Thomas Jefferson High School.

$A = 0.07*14 + 0.22*15 + 0.24*16 + 0.23*17 + 0.19*18 + 0.05*19 = 16.4$

The average age of the students at the school is 16.4 years.