Answer: B. 143/400
Explanation:
To find the missing probability P(A∩B), we can use the formula:
P(A∩B) = P(A) * P(B|A)
Given: P(A) = 11/20 P(B|A) = 13/20
Substituting the values into the formula:
P(A∩B) = (11/20) * (13/20)
Multiplying the fractions:
P(A∩B) = 143/400
Therefore, the missing probability P(A∩B) is 143/400.
The correct answer is B. 143/400.