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For a biased die the probability for dif...

For a biased die the probability 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 either face 1 or 2 has turned up. Then the probability that it is face 1 is

A

`5//21`

B

`6//23`

C

`5//23`

D

`16//21`

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The correct Answer is:
A
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