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in Mathematics by (92.0k points)

For Okhi relief fund, the girls of 9 A donated rupees 4400, and the boys donated rupees 4200, The average amount given by the girls is rupees 200 and that of boys is rupees 150. Then, 

(a) How many students are there in the class ? 

(b) Find the average amount given by the students of 9 A.

1 Answer

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Best answer

Let the number of boys in class IX A be x and number of girls be y

Average amount given by girls = Rs. 200

(a) Total amount donated by girls = Rs. 4400

Number of girls in class IX A = Total Amount/ Avg-amount 

= 4400/200

Number of Girl (y) in class IX A = 22

Number of boys (x) in class IX A = Total Amount / Avg-amount

= 4200/150

Number of boys (x) in class IX A = 28

Total student in class IX A (x + y) = 22 + 28

= 50

(b) Avg. amount given by the student of class IX A

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