conversations.from: human
conversations.value: 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?
  Give me a solution to this problem
conversations.from: assistant
conversations.value: 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.