Question

Find the set B if A − B = {1, 2, 4}, B − A = {7, 8} and A∪B={1,2,4,5,7,8,9}

Answer 1

Answer:

B = {5, 7, 8, 9}

Step-by-step explanation:

As A U B = {1, 2, 3, 4, 5, 7, 8, 9}

A - B = {1, 2, 4}

B − A = {7, 8}

Here, Elements of set A which are not in B are 1, 2 and 4.

So, B = {5, 7, 8, 9}

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