In a survey, a group of students were asked their favorite sport. Eighteen students chose “other” sports. Then how many students participated?
1 answer:
18 students are 100%-37,5%-40%=22,5% So we know that 18 students equal to 22.5. And we are looking for the anwser what 100% of students is. SO: x students - 100% (22 + 1/2)x =18×100 (22 + 1/2) can be represented as just 25.5 -//- = 1800 we need to divide bot sides by 25.5 x = 1800 / 25.5 ... x = 80
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