Answer:

a) Partitive Proportion

b) 40students 3:5

Step-by-step explanation:

Ratio and Proportion

*Partitive Proportion because we are interested in knowing how many are boys and how many are girls given a total number of students.

40students 3:5

First we add all of the units in the given ratio:

3:5 ----> 3+5=8

Now we divide the total number of students with the total units to get the students per unit:

40÷8=5

This means that in every 1 unit, there are 5 students.

To get the exact number of boys and girls, we multiply the given units in the ratio to the number of students per unit or (k):

BOYS: 3×5 = 15

GIRLS: 5×5 = 25

Checking:

15boys + 25girls = 40 students