400
a special lottery is to be held to select the students who will live in the only deluxe room in a dormitory. There are 100 seniors, 150 juniors, and 200 sophomores who applied. Each srs. name is placed in the lottery 3 times; each jrs. names 2 times, and eacher sophs. names 1 time. The probability that a srs. name will be chosen is:
What is 3/8?