Complement set || De morgan's law || n(AUB) =n(A)+ n(B)-n(A v B) || Revision OF 9th class Probability || Empirical Probability || Theoretical/Classical probability || Examples

Two sets A and B are such that n(A cup B)=21,n(A' cap B')=9,n(A cap B)=7 find n(A cap B)'

Two sets A and B are such that n(A uu B)=21,n(A'nn B')=9,n(A nn B)=7 find n(A nn B)'

If A and B are two sets, then n(A)+ n(B) is equal to

A unbaised coin is tossed n times. If the probability of getting 5 heads is equal to the probability of getting 6 heads then probability of getting 3 heads is

A positive integer 'n' not exceeding 100, is chosen in such a way that if n le 50 , then the probability of chossing n is 'p' , and if n gt 50 , then the probability of choising n is '3p'. The probability that a perfect square is chosen is

Do the following activities. Total number of students in your class , n(S) = square Number of students from your class , wearing spectacles n (A) = square Probability of a randomly selets student wearing spectacles, P (A) = square Probability of a randomly selected student not wearing spectacles , P (B) = square

If A and B are two sets such that n(A) =23, n(B)=37 and n(A - B) =8 then find n(Acup B) .