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It has been found that a tire made from an experimental compound will fail 20 % if the time on
rough terrain. If 15 trucks are to be tested on rough terrain (each with four tires), then;
a) what is the probability of any given truck finishing without tire failure?
b) how many trucks do you expect to finish the the test? (assume the only reason for not
finishing is tire failure).
please write down the steps.
Solution
n = 15
p= 20% =0.2
1) P(x=0) = 15 C 0 0.2^0 0.8^15= 0.03518437208883
2) Expectation = E = 15*0.2 = 3
3 are no of trucks

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It has been found that a tire made from an experimental compound wil.pdf

  • 1. It has been found that a tire made from an experimental compound will fail 20 % if the time on rough terrain. If 15 trucks are to be tested on rough terrain (each with four tires), then; a) what is the probability of any given truck finishing without tire failure? b) how many trucks do you expect to finish the the test? (assume the only reason for not finishing is tire failure). please write down the steps. Solution n = 15 p= 20% =0.2 1) P(x=0) = 15 C 0 0.2^0 0.8^15= 0.03518437208883 2) Expectation = E = 15*0.2 = 3 3 are no of trucks