Probability Conceptual

Bag A contains 9 red marbles and 3 green marbles. Bag B contains 9 black marbles and 6 orange marbles. Find the probability of selecting one green marble from bag A and one black marble from bag B.

• 3/20

• 1/4

• 3/31

• 2/27

A day in the year is randomly chosen. Given the day is in the month of December, what is the probability the day is the 25^th? (December has 31 total days.)

• 8.5%

• 8.84%

• 80.6%

• 3.2%

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement. P(1st orange then green)

• 1/15

• 2/15

• 3/31

• 1/5

A box contains 5 purple marbles, 3 green marbles and 2 orange marbles. Draws are made without replacement.P(both marbles are purple)

• 2/9

• 1/3

• 1/2

• 1/4

Which is the best way to represent answering 25 multiple-choice questions with 4 choices for each answer?

• spin a spinner with four sections 25 times

• roll a die 25 times

• flip a coin 25 times

• roll a die 4 times

Samuel has 5 different colors of pens and 2 different colors of paper. Which model could be used to show how many different choices he has?

• spin a spinner with 5 sections, then flip a coin

• roll a die 5 times

• flip a coin 5 times

• roll a die, then flip a coin 5 times

What is P(Foreign language | Sport)?

• 14/27

• 7/12

• 23/47

• 37/47

What percentage of the days that it rained, did they forecast no rain?

• About 20%

• About 18%

• About 14%

• About 12%

A bag contains 5 red marbles and 4 pink marbles. A marble is randomly drawn and then replaced. What is the probability the first marble is pink and the second is red?

• 26.9%

• 24.7%

• 20.0%

• 5%

A certain brand of TV has a 50% chance of being defective. Which model could be used to determine the probability that when two TVs are chosen, they will both be defective?

• spin a spinner with 4 equal sections

• roll a die twice

• flip a coin twice

• flip a coin, then roll a die