Question

If A = { X /X is a multiple of 5< 15} B = { X/ X is a factor of 15} verify n(A U B) = n (A) + n(B) - n ( A intersection B)
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Answer 1

Answer:

A={5,10}

B={1,3,5}

A∩B={5}

Answer 2

Answer:

A={5,10}

B={1,3,5}

A∩B={5}