A total of 500 students were asked which one of four colleges they attended and whether they preferred soccer or hockey. The numbers of students in each category are shown in the following table. Find the probability that a randomly chosen student is at Devar college given that he prefers soccer. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................
Exam No：9709_s20_qp_52 Year：2020 Question No：2(b)
Answer:
\(P(D \mid S)=\frac{P(D \cap S)}{P(S)}=\frac{120}{280}\)
\(\frac{120}{280}\) or \(\frac{3}{7}\)
\(\frac{120}{280}\) or \(\frac{3}{7}\)
Knowledge points:
5.3.4 calculate and use conditional probabilities in simple cases.
Solution:
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