In a hotel we can order two types of varieties, but we can make 7 more varieties in home. One can choose the four varieties with two from hotel as must. Find how many ways one can order.  Choices:  A) 14  B) 15  C) 56  D) 21  E) 29
2c2*7c2=21ways   ANSWER:21
<result>D</result>
In a hotel we can order two types of varieties, but we can make 7 more varieties in home. One can choose the four varieties with two from hotel as must. Find how many ways one can order.