Probability
A bag of marbles contains 7 black marbles and 4 red marbles. When pulling one marble from the bag, what is the probability it will be a black marble?
7/11
1/10
Convert to a decimal
0.1
Calculate the range of the data set.
{57, 49, 103, 44, 90, 102, 49}
59
-3 + 5 = ?
2
-8 + (-5) = ?
-13
Amir rolls a 20-sided die. What is the probability that the result will have 2 digits? (##)
11/20 or 55%
(10 through 20)
0.25
Convert to a fraction
1/4
What is the mode of the following data set?
{5, 2, 13, 4, 5, 20, 5, 8, 4, 16}
5 (appears three times)
9 - 10 = ?
-1
-42 ÷ 6 = ?
-7
Maria rolls a 12-sided die twice. What is the probability that she will roll a 3 both times?
1/144 or 0.694%
0.036
Convert to a percentage
3.6%
Find the mean, median, and mode of the following data set:
{8, 17, 3, 12, 7, 4, 12}
Mode: 12
Median: 8
Mean: 9
√36 = ?
6
52
25
Which probability is greater (more likely to happen)?
The probability of rolling a 1 on a 6-sided die
OR
The probability of rolling an even number on a 20-sided die
Probability of rolling an even number on a 20-sided die (1/2 > 1/6)
George and Teresa are hiking together, and both had full, identical water bottles when they started. George has 3/5 of his water remaining, and Teresa has 6/7 of hers.
Who has drunk more water?
George - 2/5 > 1/7
What is the difference (in value) between the mean and the median of the following data set?
{10, 13, 15, 16, 17, 19}
0.5
(Mean is 15, Median is 15.5)
(-6)(-5) = ?
30
-3 x 10 = ?
-30
A bag of marbles contains 7 black marbles and 4 red marbles. When pulling two marbles from the bag without replacing the first, what is the probability that both will be red marbles?
6/55 or 10.9%
Place the following numbers in order from least to greatest:
0.4, 12%, 5/9, 1/8
12%, 1/8, 0.4, 5/9
Veronica scored a 75 and a 71 on her first two exams. To raise her mean score to an 80, what grade does she need to earn on her third test?
94
-83 = ?
-512
√-4 = ?
Undefined