The correct answer is NO LINEAR FACTORS (option A ).
Ur answer in attachment hope it helps you
Answer:

Step-by-step explanation:




Answer:
120
Step-by-step explanation:
The subcommittee needs to contain 1 out of 3 freshmen, 1 out of 4 sophomores, 1 out of 5 juniors and 1 out of 2 seniors. Assuming order is not important, the number of possibilities to pick the subcommittee members is given by:

There are 120 possible subcommittees.
What do you mean doubling? You can add 7+7+7 which equals 21.