Question

A class of 40 students has 11 students who ride the bus and 10 students who are in the band. Three of the students who ride the bus are also in the band. One student is chosen at random. Find the probability that this student is in the band if it is known that the student does not ride the bus. Round to the nearest thousandth.

Answer 1

The denominator is 40
10-3=7 (number of students in the band who do not ride the bus)
7/40=0.175
0.174*100=17.5% chance
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