$$\mu\_X = 60 * 0.4 = 24$$  $$\sigma\_X = \sqrt{60*0.4*0.6} = 3.79$$ 
A binomial event has n = 60 trials. The probability of success on each trial is 0.4. Let X be the count of successes of the vent during the 60 trials. Whart are the $$\mu\_x$$ and $$\sigma\_x$$? 
A. 24, 3.49 
B. 24, 14.4 
C. 4.90, 3.79 
D. 4.90, 14.4 
E. 2.4, 3.79 