How many ways can an IRS auditor select 3 of 11 tax returns for an audit?

There are 8 members on a board of directors. If they must form a subcommittee of 3 members, how many different subcommittees are possible?

License plates are made using 3 letters followed by 3 digits. How many plates can be made if repetition of letters and digits is allowed.

At the first tri-city meeting, there are 8 people from town A, 7 people from town B, and 5 people from town C. If a council consisting of 5 people is randoml selected, find the probabilit that 3 are from town A and 2 are from town B.

1 answer

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The first answer is 11*10*9/(1*2*3)= 165,
since the order they are picked does not matter.