Set Theory and Probability

What is A U B ?

• {0, 1, 2, 3, 4, 5, 6, 8}

• {1, 2, 4, 6, 8}

• {0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 8}

• {2, 4, 6}

The letters that form the word ALGEBRA are placed in a bowl. What is the probability of choosing a letter other than “A”?

• 2/7

• 5/49

• 5/7

• 10/49

Probability can be written as ...

• a fraction

• a decimal

• a percent

• all of the above

A likely chance event is closer to what number?

• 0

• 1

• .5

• 100

P(A^c) = P(not A) =

• 6/8

• 3/4

• 2/8

• 1/4

What is A ∩ B ?

• {0, 1, 2, 3, 4, 5, 6, 8}

• {1, 2, 4, 6, 8}

• {0, 1, 2, 2, 3, 4, 4, 5, 6, 6, 8}

• {2, 4, 6}

Left Pocket (L) = {pencils, erasers, pens}
Right Pocket (R) = {gloves, paper, coins, phone}
What is L ∪ R?

• ∅

• {pencils, erasers, pens}

• {gloves, paper, coins, phone}

• {pencils, erasers, pens, gloves, paper, coins, phone}

Left Pocket (L) = {pencils, erasers, pens}
Right Pocket (R) = {gloves, paper, coins, phone}
What is L ∩ R?

• ∅

• {pencils, erasers, pens}

• {gloves, paper, coins, phone}

• {pencils, erasers, pens, gloves, paper, coins, phone}

An unlikely chance event is closer to what number?

• 0

• 1

• 2

• 3