Question 259392: a craftsperson is able to etch 25 windows per day if they are able to use the laser etching device, and 8 windows per day if they must etch by hand. if they can use the laser etching device 70% of the time, find the expected number of windows they etch per day
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! a craftsperson is able to etch 25 windows per day if they are able to use the laser etching device, and 8 windows per day if they must etch by hand. if they can use the laser etching device 70% of the time, find the expected number of windows they etch per day
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P(use laser) = 0.7
P(use manual) = 0.3
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Random Variable Values is 25 and 8
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Expected numbers are 0.7*25 + 0.3*8 = 17.5 + 2.4 = 19.9 windows per day
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Cheers,
Stan H.
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