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Construction company A is determining whether it should submit a bid for a new shopping center. In the past, their main compe
Construction company A is determining whether it should submit a bid for a ne bid on a job, the probability that company A wi
ould submit a bid for a new shopping center. In the past, their main competitor, construction co ne job is 0.60. If company B
Question Help competitor, construction company B, has submitted bids 90% of the time. If company B does n any A will get the
Construction company A is determining whether it should submit a bid for a new sh mid on a job, the probability that company
Construction company Ais determining whether it should submit a bid for a new shopping center. In the past, their main compet
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Answer #1

Solution

\bar{B} 10% B 90%

A \rightarrow A get the job

We have

P(\bar{B} ) =0.10 , P(A/ \bar{B} ) =0.60

P(B ) =0.90 ,   P(A/ B ) =0.25

P(A) = P(\bar{B} ) *P(A/ \bar{B} ) + P(B ) * P(A/ B )

= 0.10 *0.60+ 0.90*0.25

= 0.060 + 0.225

= 0.285

(a) P (\bar{B}/A ) =     \frac{P( \bar{B}) *P(A/ \bar{B} )}{ P( \bar{B}) *P(A/ \bar{B} ) + P(B ) * P(A/ B ) }

P (\bar{B}/A ) = \frac{P( \bar{B}) *P(A/ \bar{B} )}{ P( \bar{B}) *P(A/ \bar{B} ) + P(B ) * P(A/ B ) } =\frac{0.060}{0.285}

P (\bar{B}/A ) = 0.211 Answer

(b) P(A) = 0.285 Answer

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