in a school of 6422 students ratio of girls to boys 5:8, 1/5th of girls and 1/8th boys took part in a a school camp. fraction of total strength took part in camp is
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6422 is it the correct number
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Total number of students in school = 6422
Let, the ratio of boys and girls be 5x and 8x respectively
5x + 8x = 6422
= 13x = 6422
= x = 6422/13
= x = 494
Total number of girls = 5x = 5×494 = 2470
Total number of boys = 8x = 8×494 = 3952
1/5 of girls went on camp = 2470/5 = 494
1/8 of boys went on camp = 3952/8 = 494
Total students taking part in the camp = 494+494 = 988
Fraction of the total strength took part in the camp = 988/6422 = 2/13.
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