(Solved): In a survey of 150 students, 70 were taking mathematics and 10 were taking psychology. a) What is ...

In a survey of 150 students, 70 were taking mathematics and 10 were taking psychology. a) What is the least number of students who could have been taking both courses? b) What is the greatest number of students who could have been taking both courses? c) What is the greatest number of students who could have been taking neither course? a) The least number of students who could have been taking both courses is

. b) The greatest number of students who could have been taking both courses is

. c) The greatest number of students who could have been taking neither course is