A box contains ten balls, numbered 1 through 10. Marisha reaches in without looking and draws a ball. Then Penney draws a ball without looking. Find each probability.
A) P( the sum of the numbers is even)
B) P( the sum of the numbers is odd)
C) P( the sum of the numbers is 7)
D) P( the sum of the numbers is 20)
E) P( the sum of the numbers is prime)
F) P( the sum of the numbers is greater than 8)