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An eight-sided die has the numbers 1 through 8 on its eight faces. What is 2 points
the expected value when rolling the die? *
O 3.6
04
4.5
06

Respuesta :

Answer:

4.5

Step-by-step explanation:

(1/8)*1 + (1/8)*2 + (1/8)*3 + ... +(1/8)*8

or

(1/8)*(1  2 + 3 + 4 + 5 + 6 + 7 + 8) = (1/8)*36 = 4.5

We can use a shortcut to sum the numbers 1 through 8.  It is given by 8*(8+1)/2.

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