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Jana has a number cube numbered 1 to 6. She plans to roll the cube 78 times. Predict the number of times Jana will roll a 2.

User Riegersn
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1 Answer

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The probability of rolling a 2 is
\frac16 for any one roll of the cube.

In 78 rolls, the expected number 2s would be
\frac{78}6=13.
User Moin Zaman
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