The expected number of 5's would be rolled is 5 times if the Gavin rolls a fair dice 30 times.
It is defined as the ratio of the number of favourable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.
Total outcomes = {1, 2, 3, 4, 5, 6]
Total number of outcomes = 6
Favourable outcomes = {5}
Total number of favourable outcomes = 1
Probability of rolling 5 = 1/6
The expected number of 5's would be 30×(1/6) = 5 times
Thus, the expected number of 5's would be rolled is 5 times if the Gavin rolls a fair dice 30 times.
Learn more about the probability here:
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