Luis rolled a number cube 60 times. He rolled the number 6 four times. Which is most likely the cause of the discrepancy between Luis’s experimental outcome and the predicted outcome?

For a fair number cube, the predicted number of 6s in 60 rolls is 60 × 1/6 = 10. Luis rolled only four 6s, which can happen because results vary, especially with a limited number of trials. So the most likely cause is that he did not perform enough trials; adding or subtracting numbers would not explain the difference.

AI-written and checked against the verified answer.