In a class the ratio of number of boys to the number of girls is 4:5. If the number of girls is 20, find the number of boy ??

25

Step-by-step explanation:

The answer is 25 because if the ratio is 4:5 and there are 20 girls that means they multiplied 4 times 5 to get 20 and that means you have to do the same to the ratio of boy and when you multiply 5 times 5 you get 25

Let x and y be the no. of boys and girls in the class.

Then,

x/y = 4/5

=> 20/y = 4/5 [Given that x = no. of boys = 20]

=> 4y = 20×5

=> 4y = 100

=> y = 100/4

=> y = 25

Therefore the no. of girls in the class is 25

Step-by-step explanation:

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g = (2, 2)

step-by-step explanation:

given the ratio is 1 : 1 then f is the midpoint of eg

let the coordinates of g = (x, y)

using the midpoint formula

(0 + x) = 1 ( multiply both sides by 2 )

0 + x = 2 ⇒ x = 2

similarly

(4 + y) = 3 ( multiply both sides by 2 )

4 + y = 6 ( subtract 4 from both sides )

y = 2

coordinates of g = (2, 2)

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