Please help me and answer this quickly. There were 20 participants in a competition. The average score was 62. The average score of the girls was 70 and that of the boys was 60. How many girls competed in the competition?
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Total score =20*62=1240
Let x be number of girls
Therefore 70x+(20-x)*60=1240
70x+1200-60x=1240
10x=40
X=4 so 4girls and 16 boys are there
Let x be number of girls
Therefore 70x+(20-x)*60=1240
70x+1200-60x=1240
10x=40
X=4 so 4girls and 16 boys are there
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