Question

If two different integers between 1 and 100 inclusive are chosen at random, what is the probability that the difference of the two numbers is 15

Answer 1

Answer: 17 / 990

Explanation:

To obtain the probability of the question above :

Find the count of number pairs whose difference gives is 15 in the range (1 to 100).

Also find the count of all distinct number pair differences

Number pair which have a difference of 15 = 85

Total distinct number pair differences = 4950

Probability = required outcome / Total possible outcomes

P(difference of 15) = 85/4950 = 17/990