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1. A tetrahedron (regular four-sided polygon) has four sides numbered 10, 20, 30 and 40.  A pair...

1. A tetrahedron (regular four-sided polygon) has four sides numbered 10, 20, 30 and 40.  A pair of fair tetrahedral are tossed.

  1. Find the sample space for this event.
  1. Calculate the probability that the sum of the two rolls is exactly 30.
  1. Calculate the probability that the sum of the two rolls is greater than 20.
  1. Calculate the probability that the sum of the two rolls is 20 or fewer.
Math   Statistics-And-Probability   
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