If a 4-member subcommittee is to be formed from a certain 9-member committee, how many different such subcommittee are possible?	Choose the correct choice.
A) 6  B) 18  C) 20  D) 126  E) 216
Another way:   1st member can be selected in 9 ways   2nd can be selected in 8 ways   3rd can be selected in 7 ways   4th can be selected in 6 ways   So total ways : 3024   But to avoid the similar scenarios 3024/4!=126   126
<result>D</result>
If a 4-member subcommittee is to be formed from a certain 9-member committee, how many different such subcommittee are possible?