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4 August, 15:29

The guidance department has reported that of the senior class, 2.3% are members of key club, K, 8.6% are enrolled in AP physics, P, and 1.9% are enrolled in both. Determine the probability of P given K, to the nearest tenth of a percent.

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  1. 4 August, 15:50
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    P (P|K) = 82.6%.

    P (P|K) = P (K and P) / P (K) = 1.9%/2.3% = 0.019/0.023 = 0.8261 = 82.6%
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