Question

Determine the probability of rolling a sum of 9 or an odd number with two
number cubes.

Answer 1

9 = (5,4)(4,5)(3,6)(6,3)

P(9) = 4/36

P(odd) = P(3) + P(5) + P(7) + P(9) + P(11)

Note that P(9) is included in P(odd).