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Exponential distribution with a mean

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Reference no: EM132139719

The usable lifetime of a particular electronic component is known to follow an exponential distribution with a mean of 6.2 years. Let X = the usable lifetime of a randomly selected component.

(a) The proportion of these components that have a usable lifetime between 5.9 and 8.1 years is  .

(b) The probability that a randomly selected component will have a usable life more than 7.5 years is  .

(c) The variance of X is.

Reference no: EM132139719

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