Huayun hotel

Solution: If there are X people in a triple room, there are 50-x people in a double room.

( 1) 150 * 50% * x/3+ 140 * 50% *(50-x)/2 = 15 10

x=24

Triple room 24/3=8 (room)

Double room (50-24)/2= 13 (room)

(2)13 * 400 * 40%+8 * 300 * 40% = 3040 (yuan)