Out of the 150 students, 60% are girls and the rest are boys. Only 1/3 of the boys joined varsity clubs. How many of the boys did not join varsity clubs?
Let's be accurate as possible. Think before you answer.
40
Out of the 150 students, 100% - 60% = 40% are boys.

So, there are 150 x 40 / 100 = 60 boys.

Out of the 60 boys, 60 x 1 / 3 = 20 joined varsity clubs.

Therefore, 60 - 20 = 40 boys did not join varsity clubs.

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Final answer: 40