Two sets

Suppose Set B contains 69 elements, and the total number of elements in either Set A or Set B is 124. If sets A and B have 29 elements in common, how many elements are contained in set A?

Correct answer:

A =  55

Step-by-step explanation:

B=69 AB = A B AB=29 B1=BAB=6929=40 T=124  A=TABB1=1242940=55

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it help me get a 100 in math

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