A medical clinic is randomly selecting three staff members to attend a conference. The clinic employees include 7 nurses, 3 doctors, and 4 office staff. What is the probability that three nurses are selected to attend the conference?

There are 14 employees total: 7 nurses, 3 doctors, and 4 office staff. The number of ways to select any 3 staff members is 14 choose 3, or 364; the number of ways to select 3 nurses is 7 choose 3, or 35. So the probability is 35/364 ≈ 0.096, which rounds to 0.10, choice A.

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