SOLUTION: Slot machines are now video games, with winning determined by electronic random number generators. In the old days, slot machines were like this: you pull the lever to spin three w

Question 1125054: Slot machines are now video games, with winning determined by electronic random number generators. In the old days, slot machines were like this: you pull the lever to spin three wheels; each wheel has 20 symbols, all equally likely to show when the wheel stops spinning; the three wheels are independent of each other. Suppose that the middle wheel has 7 bells among its 20 symbols, and the left and right wheels have 1 bell each.
(a) You win the jackpot if all three wheels show bells. What is the probability of winning the jackpot? (Round your answer to four decimal places.)

0.000875

Correct: Your answer is correct.

(b) What is the probability that the wheels stop with exactly 2 bells showing? (Round your answer to four decimal places.)
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
Three possibilities:
1 and 2, not 3, probability is (1/20*7/20*19/20)=133/8000
1 and 3, not 2, probability is (1/20*13/20*1/20) =13/8000
2 and 3, not 1, same as the first one, 133/8000
Overall probability is 279/8000=0.0349
RELATED QUESTIONS
Slot machines are now video games, with outcomes determined by random number generators.... (answered by Boreal)

A roulette wheel has 18 red slots and 18 black slots numbered alternately with the... (answered by stanbon)

A casino advertises that it gives 95.7% payback on slot machines, and the balance is... (answered by stanbon)

A box of defective video games were accidentally mixed with a box of good video games.... (answered by ewatrrr)

Personal Budgeting- Jim Lawler spends 28% of his imcom on housing, 15% on food, 11% on... (answered by checkley75)

A casino advertises that it gives a 95.2% payback on slot machines, and the balance (answered by ikleyn)

How do I do absolute value when a variable and a number are in the absoulute value slot. (answered by MathLover1)

2.2 Roulette Wheel. The game of roulette involves spinning a wheel with 38 slots: 18 red, (answered by greenestamps)

Roulette wheel.The game of roulette involves spinning a wheel with 38 slots: 18 red, 18... (answered by greenestamps)