[Math Models] Probability

Which event is not a dependent event?

• Picking 2 students to each be line leader and door holder from a group of 20 students
• Picking 2 marbles from a bag without replacing the first marble
• Picking 2 crayons from a box at the same time (simultaneously) 
• Picking an earring, replacing it, then picking a 2nd earring

You flip a nickel three times.
Find the probability that all flips will land on tails.

• 1/2
• 1/4
• 1/6
• 1/8

If the odds of being born on each day of the week is equal, what is the probability of two separate babies both being born on a school day? (Monday through Friday)

• 5/7
• 5/14
• 25/49
• 1/49

You spin this spinner 3 times.
Find the probability of these 3 events.
P(red, odd, 3)

• 1/216
• 1/72
• 1/36
• 1/12

In a drawer, there are 6 white socks, 4 black socks, and 2 brown socks. You pick out a sock, replace it, then pick out a 2nd sock. What is the probability that you will pick a brown, then black sock?

• 1/11

• 1/18

• 1/36

• 2/33

40% of students in a school wore blue on a Spirit Day. If two students are randomly selected, what is most likely the probability that both students will not be wearing blue?

• 16%
• 36%
• 40%
• 60%

If I roll a die 30 times, it should land on '4' five times. Is this an example of theoretical or experimental probability?

• Theoretical

• Experimental

I spun a spinner 20 times and landed on red 7 times. Is this an example of theoretical or experimental probability?

• Theoretical

• Experimental

I flipped a coin 50 times. It landed on heads 29 times and tails 21 times. Which statements are true for heads?

• Theoretical = 1/2; Experimental = 1/2

• Theoretical = 29/50; Experimental = 1/2

• Theoretical = 1/2; Experimental = 29/50

• Theoretical = 1/2; Experimental = 21/50

P(not A) = 
*Remember to simplify.*

• 6/8
• 3/4
• 2/8
• 1/4