There are 15 houses in a neighborhood. Nine of the houses have 6 people in them. The remaining house

There are 15 houses in a neighborhood. Nine of the houses have 6 people in them. The remaining houses have 4 people in them. How many people are in a neighborhood.

9 houses * 6 people per house = 54 people

The remaining houses equal 15 total houses - 9 houses = 6 houses
6 houses remaining times 4 people in each house = 24 people

54 people + 24 people = 78 people in the neighborhood