Question

A number cube is rolled 360 times, and the results are recorded as follows: 41 ones, 54 twos, 62 threes, 75 fours, 33 fives, and 95 sixes. What is the experimental probability of rolling a 2 or a 3?

A : 0.32
B: 0.18
C: 0.07
D: 0.68

Answer 1

0.32.

Explanation:

Prob(Rolling a 2) = number of 2's rolled / total number of rolls

= 54/360 = 0.15

Similarly Prob(rolling a 3) = 62/360 = 0.17.

So the probability of a 2 or a 3 = 0.15 + 0.17 = 0.32.

Answer 2

They had 54 twos and 62 threes.

54 + 62 = 116 outcomes of either 2 or 3

The probability is the number of outcomes divided by the total number of rolls.

116 / 360 = 0.32

The answer is A.