Question
minAn investment firm offers its customers munici-he pal bonds that mature after varying numbers of years.Given that the cumulative distribution function of T,the number of years to maturity for a randomly se-lected bond, is F(t)=\left\{\begin{array}{ll} 0, & t<1 \\ \frac{1}{4}, & 1 \leq t<3 \\ \frac{1}{2}, & 3 \leq t
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