P(A)=1/3, P(B)=3/4, A ও B স্বাধীন হলে P(AUB) এর মান কত?
Solution
Correct Answer: Option C
দেওয়া আছে, P(A) = 1/3, P(B) = 3/4
আমরা জানি, P(A∪B) = P(A) + P(B) - P(A∩B)
= P(A) + P(B) - P(A).P(B) [যেহেতু A ও B স্বাধীন]
= (1/3 + 3/4) - (1/3 × 3/4)
= 1/3 + 3/4 - 1/4
= (4 + 9 - 3)/12
= 10/12
= 5/6
আমরা জানি, P(A∪B) = P(A) + P(B) - P(A∩B)
= P(A) + P(B) - P(A).P(B) [যেহেতু A ও B স্বাধীন]
= (1/3 + 3/4) - (1/3 × 3/4)
= 1/3 + 3/4 - 1/4
= (4 + 9 - 3)/12
= 10/12
= 5/6
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