Question

each boy gave 5 rupees each girl gave 7 rupees.total 15 children gave 83 rupees.how many boys and girls are there?​

Answer 1

Answer:

no. of boys = 11 and no. of girls = 4

Step-by-step explanation:

let no of boys be x

and no. of girls be y

by 1st condition, -     x+y=15 (no. of boys + no. of girls =15) (1)

by 2nd condition, -    5x+7y=83 (2)

multiply eq. 1 by 5

therefore eq 3 will be 5x+5y=75 (3)

subtract eq 3 from eq (2)

therefore x= 11 and y=4