The probability distribution for the number of students in statistics classes at IRSC is given, but one value is missing. Fill in the missing value, then answer the questions that follow. Round solutions to three decimal places, if necessary.

xx	P(x)P(x)
22	0.14
23	0.18
24	0.21
25
26	0.16

Find the mean number of students in a Statistics class at IRSC: == Find the standard deviation of the number of students in a Statistics class at IRSC: ==