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IQ Teaser #26
If 9 out of 10 doctors surveyed indicated that they believe 9 out of 10 doctors are competent, which of the following can we conclude?
A. 9 out of 10 doctors believe they are competent
B. At least 81% of the doctors surveyed believe they are competent
C. 90% of the doctors surveyed believe 1 doctor in 10 is not competent
A and B
A and C
B and C
A, B and C
None of the above

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