One-third 60291

In the classroom, 50% of students come from other districts. One-third of them commute by bus, a fifth by bike, and seven pupils walk. How many students are in the class?

Correct answer:

n =  30

Step-by-step explanation:

p=50%=10050=21=0.5  3x+5x+7=x  x/3+x/5+7=x  7x=105  x=7105=15  x=15  p   n = x  n=x/p=15/0.5=30

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