4 Pol QUESTION 22 Solve the problem. The probability that an individual is left-handed is 0.13. In a class of 70 students, what is the mean and standard deviation of the number of left-handed students? O mean: 70; standard deviation: 3.02 O mean: 9.1; standard deviation: 3.02 O mean: 9.1; standard deviation: 2.81 O mean: 70; standard deviation: 2.81 QUESTION 23 4 points Solve the problem. There are 12 members on a board of directors, If they must form a subcommittee of 4 members, how many different subcommittees are possible? O 24 20,736 495 11,880QUESTION 19 Solve the problem. Suppose you buy 1 ticket for $1 out of a lottery of 1000 tickets where the prize for the one winning ticket is to be $500. What are your expected winnings? O -$.40 O -$1.00 O -$.50 O SOSolve the problem. There are 9 members on a board of directors, If they must elect a chairperson, a secretary, and a treasurer, how many different slates of candidates are possible? 362,880 504 O 84 729