A Computer Store Has 75 Printers of Which 25 Are

Multiple Choice

A computer store has 75 printers of which 25 are laser printers and 50 are ink jet printers. If a group of 10 printers is chosen at random from the store, find the mean and variance of the number of ink jet printers.

A) Mean = 6.7, Variance = 2.2
B) Mean = 6.7, Variance = 1.5
C) Mean = 3.3, Variance = 2.2
D) Mean = 3.3, Variance = 1.5