Srinivasa places the nine labelled balls shown below into a box. 000 DO0000 Srinivasa then chooses two balls at random, one at a time, from the box. The first ball is not replaced before he chooses the second. 5a. Find the probability that the first ball chosen is labelled A. 5b. Find the probability that the first ball chosen is labelled A or labelled N. 5c. Find the probability that the second ball chosen is labelled A, given that the first ball chosen was labelled N.

A First Course in Probability (10th Edition)
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Chapter1: Combinatorial Analysis
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Srinivasa places the nine labelled balls shown below into a box.
000000000
Srinivasa then chooses two balls at random, one at a time, from the box. The first
ball is not replaced before he chooses the second.
5a. Find the probability that the first ball chosen is labelled A.
5b. Find the probability that the first ball chosen is labelled A or labelled N.
5c. Find the probability that the second ball chosen is labelled A, given that
the first ball chosen was labelled N.
5d. Find the probability that both balls chosen are labelled N.
Transcribed Image Text:Srinivasa places the nine labelled balls shown below into a box. 000000000 Srinivasa then chooses two balls at random, one at a time, from the box. The first ball is not replaced before he chooses the second. 5a. Find the probability that the first ball chosen is labelled A. 5b. Find the probability that the first ball chosen is labelled A or labelled N. 5c. Find the probability that the second ball chosen is labelled A, given that the first ball chosen was labelled N. 5d. Find the probability that both balls chosen are labelled N.
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