The probability that he'll draw one of these:
J,A,M,L
out of these
A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W,X,Y,Z
is 4 ways out of 26 or a probability of 4/26 or 2/13
[Notice that just because there are two A's in his name, that does not
change the probability that he will draw an A].
The probability that he'll draw one of these:
1,3,5,7,9
out of these
0,1,2,3,4,5,6,7,8,9
is 5 ways out of 10 or a probability of 5/10 or 1/2
So
P(drawing one of 4 letters AND drawing an odd numnber) =
P(drawing one of 4 letters) TIMES P(drawing an odd number) =
(2/13)(1/2) = 1/13
Edwin