8.11 probability

Ms. Angell tosses a fair coin and then rolls a fair number cube with faces labeled 1 through 6. What is the probability that the result will be heads and a number less than 4?

• 25%
• 15%
• 20%
• 40%

Ms. Seal has a bag containing 6 red, 8 blue, 5 green, 9 yellow and 2 white marbles. What is the probability of randomly choosing a white marble on the first pick, replacing it, and then randomly choosing a red marble on the second pick?

• 1/75
• 1/10
• 1/90
• 2/45

Alma has 10 chips in her pocket.  The chip colors are 2 blue, 5 green, and 3 red 
Without looking, Alma pulls 1 chip from her pocket and places it on a table. Then, she pulls another chip from her pocket. What is the probability the first chip is blue and the second is red?

• 1/3
• 3/10
• 1/15
• 1/5

Clara picks a card at random, puts it back, and then picks another card at random.

• Independent
• Dependent

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CCSS.7.SP.C.5

CCSS.7.SP.C.8

You have a bag of 10 marbles. Four are red and 6 are blue. What is the probability of drawing a blue marble, putting it aside, and then drawing a red marble?

• Dependent
• Independent

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CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

A cooler contains 20 sodas: 6 Sprites, 4 Mountain Dews, 3 Pepsi, and 7 Grape Crushes.  Diamond wants a Grape Crush but cannot see in the cooler.  What is the probability that she picks a Mountain Dew, puts it back,and picks her Grape Crush?

• 7/570
• 21/200
• 7/57
• 7/100

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

Talon bought a bag of gumballs.  He has 3 blue, 5 yellow, 2 pink, and 2 orange gumballs.  What is the probability that he will select and chew a yellow gumball and then select another yellow gumball?

• 20/121
• 5/33
• 5/36
• 20/144

One marble is picked from a jar without looking. If the jar has 4 blue marbles, 3 green marbles, and 2 red marbles, what is P(not red)?

• 5/9

• 2/9

• 1/9

• 7/9

What is the probability of spinning an even number? 

• 16 2/3%
• 33 1/3%
• 50%
• 75%

What is the probability of spinning a prime number? 

• 1/2
• 2/3
• 1/6
• 0

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7