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:

$\frac{8}{100}=0.08$

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:

$(250)(\frac{30}{100})=75$

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

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

$(250)(\frac{5}{100})\approx13$

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

$(250)(\frac{17}{100})\approx43$

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.