Suppose that random variable X follows a normal distribution with mean 20 and standard deviation 10. Let Y-10-2x. If P(ksY<30)-0.4, the value of k is closest to O -25 O -17 O -21 O-19 O -23

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Suppose that random variable X follows a normal distribution with mean 20 and standard deviation
10.
Let Y=10-2x. If P(ksY<30)-0.4, the value of k is closest to
O -25
O -17
O -21
O-19
O-23
Transcribed Image Text:Suppose that random variable X follows a normal distribution with mean 20 and standard deviation 10. Let Y=10-2x. If P(ksY<30)-0.4, the value of k is closest to O -25 O -17 O -21 O-19 O-23
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