The question is an illustration of probability, and the value of P(B|C) is P(B|C) = 9/24 =0.38
The table is given as:
           C          D        Total
 A         15          21         36
 B          9          25         34
Total        24         46         70
The probability (BIC) is calculated using:
P(B|C) = n(B and C)/n(C)
From the table, we have:
n(B and C) = 9
n(C) = 24
So, the equation becomes
P(B|C) = 9/24
Evaluate
P(B|C) = 0.38
Hence, the value of P(B|C) is P(B|C) = 9/24 =0.38
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