JEE Main 2025 Mathematics question
Three distinct numbers are selected randomly from the set {1, 2, 3, …, 40}. If the probability, that the selected numbers are in an increasing G.P., is , gcd(m, n) = 1, then m + n is equal to .
Answer: 4949
Solution
Total favorable = 18 (from counting ratios 2,3,4,5,6). Probability = 18/9880 = 9/4940. m+n = 4949.