Out of `3n` consecutive integers, there are selected at random. Find the probability that their sum is divisible by 3.

Out of 3n consecutive integers, three are selected at random. Find the probability that their sum is divisible by 3.

Out of 3n consecutive integers, three are selected at random. Find the probability that their sum is divisible by 3.

Out of 3n consecutive integers, three are selected at random. Find the probability that their sum is divisible by 3.

Out of 3 n consecutive integers, three are selected at random. Find the probability that their sum is divisible by 3 is

Out of 3n consecutive integers, three are selected at random. Show that the chance that their sum is divisible by 3 is (3n^(2)-3n+2)/((3n-1)(3n-2))

Out of 30 consecutive integers 2 are choosen at random. Find the probability so that their sum is odd.

Out of 30 consecutive integers two are drawn at random. Then what is the probability that their sum is odd.

Out of 40 consecutive integers, two are chosen at random, the probability that their sum is odd is

Out of 30 consecutive integers, three integers are drawn at random. Find the probability that their sum is (i) an odd number (ii) an even number