00:01
The problem says total number of 60 kids were asked which movie they liked.
00:07
24 said they liked aline and 48 said they liked beauty and the beast.
00:16
So how many in total liked both? so let us suppose this is this value is n -a, right? and this is n -b.
00:28
We are just supposing it.
00:30
Of number of people or kids who like aladdin and the number of people who like beauty and the beast so here total number of kids that is an a union b we have just supposed this this is this is as a whole right those who liked those who belong to aladdin and those who belong to beauty and the base so this is a union b right so now now the formula for set theory, formula for set, two sets we can write.
01:17
So this is a union b is something which is as a whole, right? and a intersection b is something which is in common between two things.
01:27
So here the formula could be written as n.
01:30
A union b equals to n -a plus nb plus nb plus.
01:40
So this is minus actually.
01:51
So this is minus n .a intersection b...