Question 1019028
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in a class of 30 students, 20% have black hair, 10% have blonde hair and 70% have brown hair. 
Calculate the number of students with a) black hair b)blonde hair c)brown hair
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a) black hair: {{{30*(20/100)}}} = . . . (?)


b) blonde hair: {{{30*(10/100)}}} = . . . (?)


c) brown hair: {{{30*(70/100)}}} = . . . (?)


Calculate yourself these numbers.