Lesson 43 Mega Millions probability distribution.notebook February 02, 2011
1) A spinner numbered only with even numbers between 412 is
spun. Make a probability distribution for the random variable
X = number showing on the spinner.
What is the expected value (average) of X?
What is the standard deviation of X?
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Lesson 43 Mega Millions probability distribution.notebook February 02, 2011
Feb 28:42 AM
5 + 1 Jackpot 1 in 175,711,536
5 + 0 $250,000 1 in 3,904,701
4 + 1 $10,000 1 in 689,065
Each ticket costs $1
4 + 0 $150 1 in 15,313
Pick 3 + 1 $150 1 in 13,781
5 Numbers from 156 3 + 0 $7 1 in 306
2 + 1 $10 1 in 844
1 number (megaball) from 146
1 + 1 $3 1 in 141
The table on the right shows all the
different possible prizes. 0 + 1 $2 1 in 75
Make a probability distribution for the random variable X = winnings for 1 ticket
What are the expected winnings of each ticket (not including the jackpot?)
$ 0.18189
How much money must the jackpot pay off in order to make the
overall expected winnings equal to $1?
1 .018189 = .81811
j = $143,752,176.80
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Lesson 43 Mega Millions probability distribution.notebook February 02, 2011
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