# Math

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If you toss a pair of dice 1,000 times, how many times would you expect to get a sum of 12 as the result?

The lesson doesn't show me how to work this. Whats the formula?

• Math -

the prob of getting 12 when tossing 2 dice = 1/36

so the number expected doing this 1000 times
= 1000 x 1/36 = 250/9
= 27.777

so it would happen approx 28 times.

• Math -

If you toss 3 coins 10,000 times, how many times would you expect that exactly 2 heads appear?

• Math -

Tossing a die= 1/36 and so, the number expected of doing this 1000= 1/36 *1000=27.77777778 Approximately 28

• Math -

36

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