Tim has 3 dice, one with 4 sides, 5 sides, and 6 sides. Each dice is fair and has faces (1, 2, ... n) where n is the number of sides. Tim proceeds as follows: he rolls each die one at a time (starting with the four sided, then five, then six). However, if Tim ever rolls more than a three he stops rolling the dice. Let X be the sum of all the dice Tim rolled.

1. Compute E[X].

2. Compute P(A). Where A represents the event that Tim rolled a five with one of the die.

Answer rating: 100% (QA)

1 The sample space consists of S121 122 221 212 112 211 ... View the full answer