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In a class of 140 students numbered 1 to...

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

A

`38`

B

`42`

C

`102`

D

`1`

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A
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