Question

You have two boxes of colored pens. The first box contains a red pen, a blue pen, and green pen. The second box contains a yellow pen, a red pen, and a black pen. What is the set that represents all the pens?

A. {red pen, blue pen, green pen}
B. {red pen}
C. {red pen, red pen, green pen, yellow pen, black pen}
D. {red pen, blue pen, green pen, yellow pen, black pen}

Answer 1

D. Although C might be correct, D lists the blue pen that is in the first box and C doesn't.

Answer 2

Answer: Unions and Intersections of Sets Quick Check

1. {Red pen,blue pen,green pen,yellow pen,black pen}

2. {Walnuts, peanuts, pistachios, pecans, almonds, Brazil nuts}

3. {0,3,6,9,12}

4. {Fever, joint pain,tiredness}

5. {Wheat, baking soda, salt}

Explanation: