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BECE Mathematics 2011 Paper

Question : 8

Total: 40

A=\{18,19,20\}

B=\{15,16,17\}

A \cap B

Solution:

Concept:

The intersection

A \cap B

contains only the elements common to both sets.

Explanation:

Set

A = \{18,19,20\}

and set

B = \{15,16,17\}

Compare the elements of both sets.

There is no element present in both

A

and

B

Therefore,

A \cap B

is the empty set.

Answer:

A \cap B = \emptyset = \{\}

So the correct choice is the option representing the empty set.

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