Question

I need to now the answer for a and b

Answer 1

Knowing that there is a total of 250 6th grade students that participated in the challenge:

a. You can identify that:

-The percentage of students that participated in lifting leights is 8%.

A percent can be written as a decimal number by dividing it by 100:

`(8)/(100)=0.08`

Therefore, the number of students that participated in that exercise is:

`(250)(0.08)=20`

- The percentage of students that participated in running is 30%.

Therefore, the number of them that participated in this exercise is:

`(250)((30)/(100))=75`

- Notice that the percentage of students that participated in swimming is 5%.

Hence, the number of them that participated in this exercise is:

`(250)((5)/(100))\approx13`

b. Notice that the number of students who chose walking is:

`(250)((17)/(100))\approx43`

Therefore, the total number of students that chose swimming, walking, and lifting weight is:

`13+43+20=76`

Notice that that number is greater than the number of students who chose running.

Hence, the answers are:

a. Lifting Weights:

`20\text{ students}`

Running:

`75\text{ students}`

Swimming:

`13\text{ students}`

b. Joseph is right, because there are 76 students who chose swimming, walking, and lifting weights, and there are 75 students who chose running.