#131  There are 60 people on the B train and 20 people on the D train. Half of the people from the B train go on the D train. Half of the people from the D train get out. How many people are left in the D train? At the next stop 1/10 of the people get off the D train. How many people get off?

Fun fact: The west 4th street subway has been around since September 10, 1932.

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