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What is the probability of answering a 9 question true false test correctly if you randomly guess?
Wiki User
∙ 13y ago
The probability of getting the first answer correct is 1/2
The probability of getting the first two correct is 1/2 * 1/2 = 1/(22)
The probability of getting all 9 correct is 1/(29) = 1/512 which is just under 0.2%
Wiki User
∙ 13y ago
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