If Q=\{1,3,5,7,9,10,11,13,15\} and T=\{1,2,3,5,6,7,10,11,12\}, find Q T.

Correct Answer is : {1,2,3,5,6,7,9,10,11,12,13,15}\{1,2,3,5,6,7,9,10,11,12,13,15\}{1,2,3,5,6,7,9,10,11,12,13,15}

\{1,2,3,4,5,6,7,8,9,10,11,12,13\}

Correct Answer is : {1,2,3,5,6,7,9,10,11,12,13,15}\{1,2,3,5,6,7,9,10,11,12,13,15\}{1,2,3,5,6,7,9,10,11,12,13,15}

Test Index

BECE Mathematics 2017 Paper

Question : 1

Total: 40

Q=\{1,3,5,7,9,10,11,13,15\}

T=\{1,2,3,5,6,7,10,11,12\}

Q \cup T

Solution:

Concept:

Union of two sets means collecting every element that appears in either set, without repeating any element.

Explanation:

Write all elements of

Q = \{1,3,5,7,9,10,11,13,15\}

first.

Now add elements of

T = \{1,2,3,5,6,7,10,11,12\}

that are not already in

Q

The new elements are

2,6,12

; the rest are already present.

List all distinct elements in ascending order:

\{1,2,3,5,6,7,9,10,11,12,13,15\}

Answer:

Q \cup T = \{1,2,3,5,6,7,9,10,11,12,13,15\}

Therefore, the correct option is D.

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