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f(x)=π14400xsin(π120x), 0<x<120f(x)=\frac{\pi}{14400}x\sin\left(\frac{\pi}{120}x\right),\ \ 0<x<120f(x)=14400πxsin(120πx), 0<x<120
A life insurance actuary estimates the probabilities of XXX, a person's life expectancy, with the probability density function as described above.
According to this model, what is ⌊E[X]⌋?\big\lfloor \text{E}[X]\big\rfloor?⌊E[X]⌋?
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