Suppose x is an exponentially distributed random variable with a mean of 10 . Use Excel to calculate the following:
a. P(x ? 15)
b. P(8 ? x ? 12)
c. P(x ? 8)
a. P(x ? 15) =EXPON.DIST(15,1/10,TRUE)
b. P(8 ? x ? 12) =EXPON.DIST(12,1/10,TRUE)-EXPON.DIST(8,1/10,TRUE)
c. P(x ? 8) =1-EXPON.DIST(8,1/10,TRUE)
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