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Q.

A salesman has  a 60% chance of making a sale to each customer.  The behaviour of successive customers is independent.  If two customers A and B enter.  The probability that the salesman will make a sale to A or B is 

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a

0.84

b

0.96

c

0.36

d

0.74

answer is B.

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Detailed Solution

P(Success)=60100,   P(FAILURE)=40100

P(Sale to Success  A or B)

=1-P (Sale to Failure A or B)

=1-40100×40100=1-0.16=0.84

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