00:01
In the first question, we're given five numbers are drawn from 20 options.
00:06
And to win, the player must match the number and the order in which they are drawn.
00:11
So take note that the five numbers are drawn without replacement.
00:21
That the order of drawing is important.
00:28
So without replacement of order is important.
00:30
We are using permutation.
00:34
That's the one, the p.
00:36
So possible draw results would be from the 20 options 3, permutation.
00:42
Now, if you do not understand this, this is equivalent to 20 options you choose five numbers, but the five numbers, there are five factorial ways of arranging them because the order is important.
00:58
Now, these two are equivalent because they give the same answer, and that would be 1860 -480 ways.
01:11
So probability in winning one ticket would be, now there's always a number one.
01:14
Only one possible set of numbers that can win.
01:21
So it's one out of this date.
01:30
And that would be 0 .000057...