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A spinner divided into equal sections numbered 0 through 8 is spun 3
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27 Jul 2022, 01:55
Expert Reply
2
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Question Stats:
75% (01:33) correct
25% (01:21) wrong based on 4 sessions
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A spinner divided into equal sections numbered 0 through 8 is spun 3 times. What is the probability that the spinner lands on a prime number all three times?
A spinner divided into equal sections numbered 0 through 8 is spun 3
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27 Jul 2022, 14:14
Expert Reply
OE
Quote:
Well, 0 is not prime, and neither is 1, which leaves 4 prime number possibilities of the 9 total. Since the spins are independent events, multiply the chances of the prime numbers together:4/9*4/9*4/9=16/81
Of course the other answer choices represent what happens if you miscount primes or add instead of multiply. Evil! (Although if you really just had to guess, you could at least eliminate E as being greater than the maximum probability of 1.)