Question

Janice rolls a fair number cube sixty times. She rolled the number four 12 times.
What is the experimental probability of rolling the number four?

Answer 1

Answer:0.5

Step-by-step explanation:

60➗12

Answer 2

Probability of an event is the measure of its chance of occurrence. The experimental probability of Janice rolling the number four is 0.2

What is experimental probability?

Experimental probability calculates the probability of some event from the results of experiments.

For an event E, we get the experimental probability of that event

$P_e(E) = \dfrac{\text{Number of times E occurred}}{\text{Number of times experiments was done}}$

where, $P_e(E)$ is denoting experimental probability of occurrence of E.

For this case, we're specified that:

The event in consideration is "Rolling the number 4"

The times she rolled the number 4 is: 12

She got four 12 times in 60 rolls of the considered cube.

Thus, we have:

• E = Rolling the number 4 on the considered cube
• Number of times E occured = 12
• Number of times experiment was done = 60

Thus, we get:

$P_e(E) = \dfrac{\text{Number of times E occurred}}{\text{Number of times experiments was done}} = \dfrac{12}{60} = \dfrac{1}{5} = 0.2$

Thus, the experimental probability of Janice rolling the number four is 0.2

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