Case Eastern Junior College awarded 26 varsity letters in

crew, 15 in swimming, and 16 in soccer. If awards went
to 46 students and only 2 lettered in all sports, how many
students lettered in two of the three sports?

26 + 15 + 16 = 57 letters awarded.

6 were awarded to the two students, leaving 51 awarded to the remaining 44 students.

You should be able to work it out from here.