Quantitative Methods Q153

153The probability of stock A going up is 0.6 and the probability of Stock B going up is 0.2. The probability that both stocks will go up is 0.15. What is the probability that Stock A will go up or Stock B will go up or both will go up?

Option : B
Explanation : Whenever or is used, use the addition rule for probabilities to calculate the probability of either of the events occurring or that both will occur: P(A or B) = P(A) + P(B) – P(AB) P(A or B) = 0.6 + 0.2 – 0.15 = 0.65.

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