Problem $7-15$

Suppose you have a project that has a $0\mathrm{.}3$ chance of tripling your investment

in a year and a $0\mathrm{.}7$ chance of halving your investment in a year. What is the

standard deviation of the rate of return on this investment? $($Do not round

intermediate calculations. Enter your answer as a decimal rounded to $4$

places.$)$

Standard deviation