one area, 1/3room owned and 2/3 rent.only 2,3,4 bedrooms.the percentage of rent 2 bedrooms to total 2 bedrooms.
1) 2/5 owned rooms are 2 bedrooms
2) 3/5 total rooms are 2 bedrooms
answer C (number not sure)
watch three movies, 30 people watch at least one movie, how many people watch only one movie?
1) 12 people see three movies
2) 20 people see at least two movies.
answer B
一个跑道宽15英尺，跑10圈，问沿外面跑的比里面跑的多跑多少？
A stock purchase price $12, sell at 90% buy price, B buy $8, sell 95% buy price. A sell 10000 shares and B 40000 shares. Average sell price?
