Question

In a class of 140 students numbered 1 to 140, all even numbered students opted Mathematics course, those whose
number is divisible by 3 opted Physics course and those whose number is divisible by 5 opted Chemistry course.
Then the number of students who did not opt for any of the three courses is
​

Answer 1

Answer:

38

Step-by-step explanation:

70_even

14_5multiple without even multiple

18_3multiple without even multiple

70+14+18=102

140-102=38

hence proved