A fair three-sided spinner has sides numbered 1, 2, 3. A fair five-sided spinner has sides numbered 1, 1, 2, 2, 3. Both spinners are spun once. For each spinner, the number on the side on which it lands is noted. The random variable $$\(X\)$$ is the larger of the two numbers if they are different, and their common value if they are the same. Show that $$\(\mathrm{P}(X=3)=\frac{7}{15}\)$$. ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................ ........................................................................................................................................................
Exam No:9709_s20_qp_52 Year:2020 Question No:5(a)
Answer:
\(\frac{7}{15} \mathbf{A G}\)
Knowledge points:
5.3.1 evaluate probabilities in simple cases by means of enumeration of equiprobable elementary events, or by calculation using permutations or combinations (e.g. the total score when two fair dice are thrown.) (e.g. drawing balls at random from a bag containing balls of different colours.)
Solution:
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