Question: The element titanium has five stable occurring isotopes, differing from each other in the number of neutrons an atom contains. If (X) is the number

The element titanium has five stable occurring isotopes, differing from each other in the number of neutrons an atom contains. If $X$ is the number of neutrons in a randomly chosen titanium atom, the probability mass function of $X$ is given as follows:

X 24 p(x) 0.0825 25 0.0744 26 0.7372 27 0.0541 0.0541 28

a. Find $\mu_{X}$.

b. Find $\sigma_{X}$.

X 24 p(x) 0.0825 25 0.0744 26 0.7372 27 0.0541 0.0541 28 0.0518

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