The length of a wire used in an electrical component is supposed to be 10cm. The machine that stamps out the parts hasn't been recalibrated recently and is making the wires (10 +y) cm long where y varies from wire to wire according to the probability density function 0

Elementary Geometry For College Students, 7e
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ISBN:9781337614085
Author:Alexander, Daniel C.; Koeberlein, Geralyn M.
Publisher:Alexander, Daniel C.; Koeberlein, Geralyn M.
Chapter9: Surfaces And Solids
Section9.CR: Review Exercises
Problem 13CR: The radius length of the base of a right circular cylinder is 6 in. The height of the cylinder is 10...
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Question 5: The length of a wire used in an electrical component is supposed to be 10cm. The
machine that stamps out the parts hasn't been recalibrated recently and is making
the wires (10 + y) cm long where y varies from wire to wire according to the
probability density function
3
fW) = 38 y(1 + y)
0<y< 4
a) If the wire is longer than 12cm, it cannot be used. What proportion of wires
produced by this machine will be unusable?
b) Given the wire is longer than 12cm, what is the probability that it is longer
than 13cm?
Transcribed Image Text:Question 5: The length of a wire used in an electrical component is supposed to be 10cm. The machine that stamps out the parts hasn't been recalibrated recently and is making the wires (10 + y) cm long where y varies from wire to wire according to the probability density function 3 fW) = 38 y(1 + y) 0<y< 4 a) If the wire is longer than 12cm, it cannot be used. What proportion of wires produced by this machine will be unusable? b) Given the wire is longer than 12cm, what is the probability that it is longer than 13cm?
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