00:01
Two dice are rolled and there are 36 possibilities.
00:07
These 36 possibilities are drawing in the table and the purple number stands for the sum of these two dice.
00:15
For example, here the sum of the two dice is six, which means the first dice lands on 2 and the second dice lands on 4.
00:28
So now let's look at this question.
00:31
It's quite similar to question 2, but here, the event e is that at least one of a pair of dice nanzasx instead of the first dice nanzas.
00:48
And now let's see the difference.
00:53
For i equals 2, 3, 4, 5, and 6, it's impossible that one of the dyes nanzas 6, and hence the probability is 0.
01:06
So if i equals 7, here there are six possibilities.
01:14
But for only this two possibilities, that at least one of the dice nons 6.
01:24
So the conditional probability is 2 over 6, which equals 1 3rd...