Question

the ratio of the number of girls to that of boys in a class is 2:5 if the number of boys is 40 find the number of girls in the class​

Answer 1

Answer:

Iftheratiooftheboystogirlsis5:4,thenwhatisthenumberofboysandgirls.

First,youwouldadd5and4,becausethatisthenumbersintheratio.

5+4=9

Lettotalnoofstudents=45

Then,youwoulddo

9

45

,andthatwouldletyoufindouthowmanystudentsisrepresentedbyeachnumberintheratio.

9

45

=5

Youwouldthenmultiply5toboth,5and4,tofindoutthenumberofboystogirls.

5(5:4)

25:20

Thereare25girlsand20boys.

Answer 2

Step-by-step explanation:

let student = x

2x,5x

according to question ;

5x= 40

x= 40/5

x= 8

girls =2x=2×8=16