Question 933564: please help me solve this question.
100 disks made of polycarbonate plastic from a supplier area analyzed for scratch and shock resistance, and 21 disks that have low scratch resistance, 16 have high shock resistance.is a disk is selected at random, what is the probability that its scratch resistance is high or its shock resistance is high? consider the event that a disk has high scratch resistance and the event that a disk has high shock resistance.are these two events independent? explain answer.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 100 disks made of polycarbonate plastic from a supplier area analyzed for scratch and shock resistance, and
21 disks have low scratch resistance,(implies 79 have high scratch resist)
16 have high shock resistance.(implies 84 have low shock resistance)
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if a disk is selected at random, what is the probability that its scratch resistance is high or its shock resistance is high?
An: P(scrath high OR shock high) = (79+16)/100 = 95/100
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consider the event that a disk has high scratch resistance and the event that a disk has high shock resistance.
are these two events independent? explain answer.
Comment:: If P(highscrath)*P(high shock) = P(high scratch |high schock)
the two events are independent.
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Cheers,
Stan H.
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