Question 255684
Lets assume that ace = 1 and jack, queen, and king have no numbers and cannot be expressed using numbers.
The odd primes are: hearts - 2,3,5,7; diamonds - 2,3,5,7; club - 2,3,5,7; 
spade - 2,3,5,7 

P(odd and prime): 16/52 = 8/26 = 4/13