Question
A basket contains 3 pink, 4 blue and 5 yellow wools. If
three wools are picked at random, what is the probability that either all are blue or either all are yellow?Solution
Total possible result = 12C3 = 220 Total number of event n(E) = 4C3 + 5C3 = 4 + 10 = 14 Required probability = `(n(E))/(n(S))` ` ` = `14/220` = `7/110`
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