School

The school attends 792 children, boys and girls ratio is 4:5. How many more girls go to school (than boys)?

Correct answer:

d =  88

Step-by-step explanation:

d=4+55−4​⋅ 792=88   Verifying Solution:   x+y=792 5⋅ x=4⋅ y  x+y=792 5x−4y=0  Pivot:Row1↔Row2 5x−4y=0 x+y=792  Row2−51​⋅ Row1→Row2 5x−4y=0 1.8y=792  y=1.8792​=440 x=50+4y​=50+4⋅ 440​=352  x=352 y=440  d1​=y−x=440−352=88 d1​=d=88  p=yx​=440352​=54​=0.8 p=4:5

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