GED GED Mathematical Reasoning – Data Analysis, Statistics, and Probability 2

Question 1

What is the mean of 4, 8, 10, 12, and 16?

Accepted Answer

10

Answer

The sum is 50, and 50 divided by 5 values equals 10.

Question 2

What is the median of 3, 9, 4, 7, 12, 5?

Accepted Answer

6

Answer

Sorted (3,4,5,7,9,12), the two middle values 5 and 7 average to 6.

Question 3

A fair six-sided die is rolled once. What is the probability of rolling a number greater than 4?

Accepted Answer

1/3

Answer

Only 5 and 6 qualify, so the probability is 2/6 = 1/3.

Question 4

A bag has 5 red, 3 blue, and 2 green marbles. Two are drawn without replacement. What is the probability both are red?

Accepted Answer

2/9

Answer

(5/10) × (4/9) = 20/90 = 2/9.

Question 5

What is the range of the data set 15, 22, 8, 30, 19?

Accepted Answer

22

Answer

Range = maximum − minimum = 30 − 8 = 22.

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