Operations with sets

Set B - A has twice as few elements as set A - B and four times fewer elements than set A ∩ B. How many times more elements does set A have than set B?

Correct answer:

k =  1.2

Step-by-step explanation:

BA = n AB = 2n A  B = 4n  k = A / B k =  BA  A  B AB  A  B   k =  n + 4n2n + 4n  k=1+42+4=56=151=1.2



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