probability scorers i need your help here please...

Of the 16 members of President Barak Obama’s first Cabinet, 4 were women. Suppose the president randomly selected 4 advisors from the cabinet for a meeting. Find the probability that the group of 4 would be composed as follows: (Hints: first define the random variable X. Then write the objective of each question in terms of X.)

a) 3 women and 1 man;
B. All men;
c. At least one woman

Question

probability scorers i need your help here please...

Of the 16 members of President Barak Obama’s first Cabinet, 4 were women. Suppose the president randomly selected 4 advisors from the cabinet for a meeting. Find the probability that the group of 4 would be composed as follows: (Hints: first define the random variable X. Then write the objective of each question in terms of X.)

a)	3 women and 1 man;
     B.   All men;
       c. At least one woman