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16. In a class of 38 boys, 3 were absent. 20% of the rest did not complete their homework.How many boys have completed their homework? |
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Answer» Total boys = 38Absent boys = 3Present boys = 38-3 = 35boys didn't complete their homework = 20% of 35= 20^100 × 35= 35^5= 7 boysboys complete their homework = 35-7= 28 boys Total boys = 38Absent boys = 3Present boys = 38-3 = 35boys didn't complete their homework = 20% of 35= 20^100 × 35= 35^5= 7 boysboys complete their homework = 35-7= 28 boys Total boys=38Boys absent =3Total boys present =38-3=35boys will not complete their homework =20%of 35=20÷100×35=7boys will not do their homework Boys complete their homework =35-7=28Hence,the no. of boys who do their homework is 28 7,28 is the correct answer of the given question Let the boys who have not completed their homework be xThen,Total no. of boys=38Boys who were present=38-3=35Boys who did'nt completed their homework=20%Hence,35 - 20% of 35=x35 - 7 = x28=x |
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