00:01
Hello, students, we need to write here a bag contains five red marbles, four blue marbles, two green marbles.
00:08
Joshua will select five marbles.
00:11
What is the probability that joshua will get three red marbles, one blue marbles and one green marbles? so basically, if i write here for this, this must be our probability that joshua will get three red marbles.
00:28
We need to write here.
00:29
This is three red marbles.
00:35
We need to we need to write here.
00:43
This must be written as one blue marble.
00:51
We need to write here and one one green marble.
00:58
We are going to write here for this.
01:00
So this must be written as five c3.
01:06
We need to write here and one blue marble four c1 multiplied by two c1.
01:16
We are going to write here for this five plus four nine nine plus two eleven.
01:22
So we need to choose five marbles.
01:25
So five c2 is and c3 is and factorial and minus factorial and r factorial.
01:36
So this must be written as five factorial, three factorial, two factorial and one is and which is four and this is two and this is eleven factorial, six factorial, five factorial.
01:54
So basically, if i write here for this, this must be written as...