If a ratio of boys to girls is 1:4 and there are 20 girls in your class, how many boys are there

Hi

1 boy for 4 girls.  so there is 4 times more girls than boys.

so 20/4 = 5

There is 5  boys in the room, 20 girls and 25 people in all.

1. is 4 and 2. is 3

step-by-step explanation:

so if you look at the first one you see that 1 is to 4 and 2 is to 8 and so on, so you can see for every 1 there is a times 4 so if it were 3 then it would be 3*4 and it is 12

for number 2 it is 3 because 1 is to 3 and 2 is to 6 so for every 1 there is 3 so if it were 3 then there would be 3*3 = 9

there is no question content here, but you for the free points! : d