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Q. A pair of dice is rolled. What is the probability of rolling a combined value of 9 or less?
First understand what is the question asking for?
1. Two dice are rolled (it means he rolled two dice it does not matter whichever dice he rolls first solution will be the same. Only think that a person took two dice in his hand and rolled).
2. Second thing we have to only think about the values as our event whose sum is nine or less then nine. cause thats what they are asking for.