(a) There are 3 numbers on the fist well and 2 letters on the second, so number of possible outcomes = 3*2 = 6 possible outcomes
The possible outcomes are 1A, 2A, 3A, 1B, 2B, 3B
So in total there are 6 possible outcomes as shown above if a person can spin the two wheels
(b) From possible outcomes A or 1 can appear four times namely: 1A,2A,3A and 1B
So probability is number of successes/ total number = 4/6