so if you draw a 6 x 6 grid you can tick the relevant boxes where the scores are the same. then work out the probability as a fraction out of 36.
Yeah, youre right but considering the fact that this is an MCQ and should take a minute or so to solve, the grid method is gonna take too long. Any shorter method?
Yeah, youre right but considering the fact that this is an MCQ and should take a minute or so to solve, the grid method is gonna take too long. Any shorter method?
Yeah, youre right but considering the fact that this is an MCQ and should take a minute or so to solve, the grid method is gonna take too long. Any shorter method?
Yes, though you need to be comfortable with probability.
The two rolls are independent events. This means that for the event "Face X on both" we take the probability of "face X on die 1" and multiply it by the probability of "face X on die 2". Clearly, X=1,2,3,4,5,6 and for each X the probability is 61⋅61=361. Since there are 6 possibilities for X, we just multiply 1/36 by 6
Yeah, youre right but considering the fact that this is an MCQ and should take a minute or so to solve, the grid method is gonna take too long. Any shorter method?
The poster is not askingyou to do a grid method - there are 36 possible outcomes - how many give a double?
Yes, though you need to be comfortable with probability.
The two rolls are independent events. This means that for the event "Face X on both" we take the probability of "face X on die 1" and multiply it by the probability of "face X on die 2". Clearly, X=1,2,3,4,5,6 and for each X the probability is 61⋅61=361. Since there are 6 possibilities for X, we just multiply 1/36 by 6