Us In a class of 40 students, 17 have ridden an airplane, 28 have ridden a boat. 10 have
ridden a train, 12 have ridden both an airplane and a boat. 3 have ridden a train only
and 4 have ridden an airplane only. Some students in the class have not ridden any of
the three modes of transportation and an equal number have taken all three.
a.
How many students have used all three modes of transportation?
Solution:
b. How many students have taken only the boat?
Solution:
c.
How many students have not taken all three modes of transportation?
Solution: