Year 9 Probability/Stats Revision #1

Jacob achieved scores of 12, 9, 7, 12 in his last four science tests. What score must he get in his next test to have a mean of 11?

• 16

• 14

• 11

• 13

• 15

What is the probability of rolling a number less than 5 on a normal dice?

• $\frac{1}{3}$

• 4

• $\frac{1}{2}$

• $\frac{2}{3}$

• 3

In a bag of 40 marbles, 28 are blue. If a marble is selected 50 times with replacement, the number of blue marbles you would expect to select is:

• 28

• 38

• 70

• 35

• 40

The median, mean and range of the data set

12, 3, 1, 6, 10, 1, 5, 18, 11, 15

are, respectively:

• 5.5, 8.2, 1−18

• 8, 8.2, 17

• 5.5, 8, 17

• 8, 8.2, 1−18

• 8, 74.5, 18

A coin is flipped 3 times, determine the probability that we will get exactly two heads

• 3/8
• 2/8
• 1/2
• 1/4

Tags

CCSS.7.SP.C.8B

The outcome table below shows the possible results of rolling a dice and flipping a coin.  Determine the probability of getting a head OR an even number in simplified form.

• 9/12
• 3/4
• 1/2
• 1/3

Tags

CCSS.7.SP.C.5

CCSS.7.SP.C.7

CCSS.7.SP.C.8

The outcome table below shows the possible results of rolling a dice and flipping a coin.  Determine the probability of getting a number less than 5 OR a tail.

• 4/12
• 4/20
• 8/12
• 10/12

Tags

CCSS.HSS.CP.B.7

You flip 3 coins. What is the probability that all three come up heads?

• 3/8
• 1/3
• 7/8
• 1/8

Tags

CCSS.7.SP.C.7B

Based on the chart, what is the experimental probability of drawing a green marble?

• 1/8

• 8/25

• 8/100

• 7/8

Tags

CCSS.HSS.ID.B.5

A tree diagram is useful in determining the __________of a probability experiment.

• result

• possible outcomes

• event

• none of the above

Tags

CCSS.7.SP.C.8