Inactive Tutor answered 08/21/20
Well we need to know what letters and numbers are on the wheel and how many there are of each...
For example, suppose it is 1,2,3..10 and A,B.C.D.E.F.G
then there are 70 possible combinations...
Probability of prime and vowel in this example is 4/10 * 2/7 = 8/70 = 4/35 = 11 3/7 %