If 3 people are chosen at random and without replacement from a group of 5 females and 3 males, the number of females chosen, XX, has probability distribution P(X)P(X) as in the table below.
XX 0 1 2 3
P(X)P(X) 0.018 0.268 0.536 0.178
Find the value of the mean plus the standard deviation.
3.33
2.37
1.94
1.87
2.58