Out of the 150 students, 100% - 60% = 40% are boys.

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

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

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

# Answer

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<|im_start|>system
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<|im_start|>user
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?
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user
40
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?
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