There are 50 students in a class. Each boy in the class contribute rupees 40 and each girl contributed rupees 50 towards Kerala Flood Relief Fund. If the total sum collected is rupees 2,220 , find the number of boys and the number of girls in the class.
solve in elimination method. please please...
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Step-by-step explanation:
Let the no. of boys be x and no. of girls be 50-x.
Total money contributed by boys= x*40=40x
Total money contributed by girls =( 50x)*50=2500-50x
According to the question,
40x+(2500-50x)=2220
⇒40x+2500-50x=2220
⇒40x+2500=2220+50x
⇒2500-2220=50x-40x
⇒280=10x
⇒280/10=x
∴x=28
No. of boys= 28
No. of girls=50-28=22
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