Conditional Probability

MediumHard
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899
Question 18
Medium

The events A and B are such that P(A)=516\displaystyle P(A) = \frac{5}{16}P(A)=165​, P(B)=12\displaystyle P(B) = \frac{1}{2}P(B)=21​ and P(A∣B)=14\displaystyle P(A|B) = \frac{1}{4}P(A∣B)=41​. Find

a.

P(A∩B)P(A \cap B)P(A∩B)

[2]
b.

P(B′∣A)P(B'|A)P(B′∣A)

[3]
c.

P(A′∪B)P(A' \cup B)P(A′∪B)

[2]
d.

Determine whether the events A and B are independent, give a reason for your answer.

[3]

Conditional Probability Questions

  1. A Level
  2. /Maths
  3. /Conditional Probability