Statistics And Probability Question 285
Question: For a biased die the probabilities for different faces to turn up are given below
Face : 1 2 3 4 5 6 Probability : 0.1 0.32 0.21 0.15 0.05 0.17 The die is tossed and you are told that either face 1 or 2 has turned up. Then the probability that it is face 1, is [IIT 1981]
Options:
A) $ \frac{5}{21} $
B) $ \frac{5}{22} $
C) $ \frac{4}{21} $
D) None of these
Show Answer
Answer:
Correct Answer: A
Solution:
-
Required probability $ =\frac{0.1}{0.1+0.32}=\frac{0.1}{0.42}=\frac{5}{21}. $
BETA
