JEE Main 2025 Mathematics question
One die has two faces marked 1, two faces marked 2, one face marked 3 and one face marked 4. Another die has one face marked 1, two faces marked 2, two faces marked 3 and one face marked 4. The probability of getting the sum of numbers to be 4 or 5, when both the dice are thrown together, is
Answer: (1)
Solution
Summing probabilities of all (a,b) pairs giving sum 4 or 5 gives 18/36 = 1/2.