The chance of a student passing an exam is 20%. The chance of a student passing the exam and getting above 90% marks in it is 5%. Given that a student passes the examination, the probability that the student gets above 90% marks is
A. $$\frac{1}{{18}}$$
B. $$\frac{1}{4}$$
C. $$\frac{2}{9}$$
D. $$\frac{5}{{18}}$$
Answer: Option B
This Question Belongs to Engineering Maths >> Probability And Statistics
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D. E(X2Y2) = (E(X))2 (E(Y))2
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