Test Index

JAMB Mathematics 2015 Paper

Question : 18

Total: 61

Given that A = {1, 5, 7}

Find (A ∪ B) ∪ C

Solution:

Concept:

The union of sets combines all distinct elements from the given sets, removing any duplicates.

Explanation:

First, find

A \cup B

: combine

\{1, 5, 7\}

and

\{3, 9, 12, 15\}

A \cup B = \{1, 3, 5, 7, 9, 12, 15\}

Then take the union with

C = \{2, 4, 6, 8\}

Combine all the elements from both results:

\{1, 3, 5, 7, 9, 12, 15\} \cup \{2, 4, 6, 8\} = \{1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15\}

Therefore,

(A \cup B) \cup C = \{1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15\}

Answer:

Option A:

\{1, 2, 3, 4, 5, 6, 7, 8, 9, 12, 15\}

Go to Question:

Prev Question

Next Question