00:01
Hello students, we are going to write here for this.
00:03
In the first case, what are the number of black marvels according to our question? so black marbles are six.
00:15
We need to write here for this.
00:18
And white marvels we are going to write here.
00:22
This must be written as, so basically white marbles are four.
00:29
And we are going to write here for this what are number of green marvels green marvels we are going to write here for this so let's erase this to make it more clear this must be 10 so basically we are going to write here for this total number of marvels are 20 right so basically if i write here for this in the first case probability that two marbles are drawn with replacement.
01:05
So basically first is black.
01:08
We need to write here for this and we need to find then green.
01:12
So basically this is the probability we are going to write here for this.
01:18
And this is the probability we need to write here for this with replacement.
01:26
So it means that we are going to write here for this.
01:30
This must be 6 divided by 20 which is probability of drawing black marvel and 10 divided by 20 we are going to write here for this so this must be this must be 3 divided by 20 we need to write here which is 0 .15 so this must be our probability in the first case now we need to write here in the second in case probability that first one is black, first one is black then...