A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory, There are 100 seniors, 150 juniors, and 200 sophomores who applied. Each senior’s name is placed in the lottery 3 times; each junior’s name, 2 times; and each sophomore’s 1 time. What is the probability that a senior’s name will be chosen?

A 1/8

B 2/9

C 2/7

D 3/8

Solution

Correct Answer: Option D

There are 100*3=300 senior

There are 150*2=300 junior

There are 200*1=200 sophomore total student=(300+300+200)=800

Prob of selecting a senior = 300/800=3/8

Solution

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