00:02
So, if two dice are old, find the probability that the following sums are obtainable, which is a, 9 or more.
00:15
So, the sum of 9 or more, probability of getting a greater than or equal to 9 is equal to 1 minus probability of less, than 9, which is equal to.
00:42
So i choose to find the complement of this because it's easier counting from 2, which is the lowest sum, up to 8, which is the highest for less than 9.
00:59
So it's what? it's 2, 3, 4, 5, 6, 7, 8, meaning to say we've got 7.
01:08
Out of 36.
01:10
So it's 7 over 36.
01:14
That's what we are subtracting from.
01:16
And this is 36 -myra -7 plus 29 over 36.
01:31
So the second part is less than 7...