00:01
In this question, we're given that s denote the event of a randomly selected college student has taken a statistics course, and c denote the event the same student had taken a chemistry course.
00:13
We're given the probability of event s, that is 0 .4, probability of event c is 0 .3.
00:21
Probability of s intersect c means taken both will be 0 .2.
00:28
So let me draw the event diagram.
00:33
This is event s and this is event c.
00:38
S intercept c will be over here and this part is 0 .2.
00:45
We want to find probability a student has taken statistics, there's even as chemistry or both.
00:55
Now n is times set notation is intercept or is plus set notation is union.
01:01
So all is union.
01:04
So as union chemistry is event c.
01:07
So we want to find probability of s union c.
01:11
The formula will be probability of s plus probability of c minus probability of s intersect c.
01:20
Probability of s is 0 .4...