Solution: How many ways are there to select 3 juniors and 4 seniors from chorus?

How many ways are there to select 3 juniors and 4 seniors from chorus with 10 freshmen, 15 sophomores, 18 juniors and 20 seniors to sing in an all-day chorus?

How many ways are there to select 3 juniors and 4 seniors from chorus?

Problem Statement:

How many ways are there to select 3 juniors and 4 seniors from chorus with 10 freshmen, 15 sophomores, 18 juniors and 20 seniors to sing in an all-day chorus?

Problem Answer:

There are 3,953,520 ways to select 3 juniors and 4 seniors from chorus with 10 freshmen, 15 sophomores, 18 juniors and 20 seniors.

Solution:

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