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 $$\sigma\_x$$? 
选项为:A:24, 3.49  B:24, 14.4  C:4.90, 3.79  D:4.90, 14.4  E:2.4, 3.79  请回答其中一个选项.