Find the expected value of the number of times a newborn bab…

Find the expected value of the number of times a newborn baby’s crying wakes its mother after midnight. ( Let X be the random variable where, X = number of times the baby’s crying after midnight).    The probability that a newborn baby does not cry after midnight is  2/50.  The probability that a newborn baby cries once after midnight is  11/50.  The probability that a newborn baby cries twice after midnight is  23/50.  The probability that a newborn baby cries thrice after midnight is  9/50.  The probability that a newborn baby cries for 4 times after midnight is  4/50.  The probability that a newborn baby cries for 5 times after midnight is 1/50.   

Mary and Mark draw 13 cards each from a standard deck of 52….

Mary and Mark draw 13 cards each from a standard deck of 52. Given that Mary has exactly two Kings, What is the probability that Mark has exactly one King?   (Assume that, all cards were chosen randomly without replacement and Mary picks her cards first then Mark picks after).