The random variable X represents the number of boys, and the possible values of X are 0, 1, 2, 3, 4.
P(X=k)=Ck6? C4? k4C4 10,? k=0, 1,2,3,4。
∴ So the distribution list of X is:
X 01234p121435 37 82114 (2) The allocation table knows that at least three boys should be selected.
That is, p (x ≥ 3) = p (x = 3)+p (x = 4) = 821+114 =1942.