If you roll two fair six-sided dice, what is the probability that the sum is 5 or lower?

Question

I need help with probabilities of compound events and how do them easily or just to get the answer. The subject is statistics and probability.

Answer 1

P(sum=2) = 1/36

P(sum=3) = 2/36

P(sum=4) = 3/36

P(sum=5) = 4/36

P(sum≤5) is the sum of all of the above; if it's a reducible fraction, do so.