SOLUTION: there are 40 students. 17 students rode an airplane only, 28students rode boat only, 10students rode train only. 12students rode both airplane and boat. 4students said they rode ai

Algebra ->  sets and operations -> SOLUTION: there are 40 students. 17 students rode an airplane only, 28students rode boat only, 10students rode train only. 12students rode both airplane and boat. 4students said they rode ai      Log On


   

Question 977827: there are 40 students. 17 students rode an airplane only, 28students rode boat only, 10students rode train only. 12students rode both airplane and boat. 4students said they rode airplane, 3students rode boat only. how many students have used all three modes of tranportation? how many students have taken only the boat? can you pls show me how to get/calculate cardinality? thank you




Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
You copied the problem incorrectly
You have more than 40 students
17 students rode an airplane only, 28students rode boat only, 10students rode train only.
Then later you say "3students rode boat only"
so which is it 28 rode the boat only or 3 rode the boat only
first you say that 17 rode the plane only but you have 4 students who say they rode a plane