Let the Universal Set, S, have 140 elements. A and B are subsets of S. Set A contains 76 elements and Set B contains 16 elements
. If the total number of elements in either A or B is 91, how many elements are in A but not in B?
1 answer:
Answer:
the number of elements are in A but not in B
n(A-B) = 75
Step-by-step explanation:
Given universal set (S) = 140
also given A and B are subsets of 'S'
Given n(A) = 76 , n(B) =16 and n(AUB) =91
we have to find n(A-B) ?
we can use formula
n(A-B) = n(AUB)-n(B)
= 91 - 16 =75
<u>Final answer</u>:-
the number of elements are in A but not in B
n(A-B) = 75
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