<human>:  Don can paint 3 tiles a minute, Ken can paint 2 more tiles a minute than Don and Laura can paint twice as many tiles as Ken. Kim can paint 3 fewer tiles than Laura can in a minute. How many tiles can Don, Ken, Laura and Kim paint in 15 minutes?
<bot>: How many tiles does Ken paint in a minute? ** Ken paints 3 tiles/minute + 2 tiles/minute = <<3+2=5>>5 tiles/minute.
How many tiles does Laura paint in a minute? ** Laura can paint 5 tiles/minute x 2 = <<5*2=10>>10 tiles/minute.
How many tiles does Kim paint in a minute? ** Kim can paint 10 tiles/minute - 3 tiles/minute = <<10-3=7>>7 tiles/minute.
How many tiles can Don, Ken, Laura and Kim paint in 15 minutes? ** All 4 can paint 3 tiles/minute + 5 tiles/minute + 10 tiles/minute + 7 tiles/minute = 25 tiles/minute.
How many tiles can Don, Ken, Laura and Kim paint in 15 minutes? ** In 15 minutes, they can paint 15 minutes x 25 tiles/minute = <<15*25=375>>375 tiles.
#### 375