What happens to the mean of the data set shown below if the number 3 is added to the data set? 6 1 10 11 6 5 9 12 13 5 10 8 6 3 2 9 OA) The mean increases by 2. OB) The mean does not change. Oc) The mean decreases by 0.25. OD) The mean increases by 1.​

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244