4x-3
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There is no specific answer to this question other than "another number" as the number in the question is unspecified.
We could use algebra to represent this by, for example, calling the new value y and the original number x and saying that y = 4x - 3 (as above).
We can not solve for y without knowing x here.
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4x-3
The expected number of rolls under 3 is the number of rolls times the probability of rolling less than 3. So: E(rolls less than 3 out of 30) = 30 * 1/3 = 30/3 = 10
2/3 the number. Two thirds the number
5x-3
Not Sure