Two investments, X and Y$,$ have the following characteristics

E$($X$)=$ $$60,$ E$($Y$)=$ $$200,$ V$($X$)=$ $$9,000,$ V$($Y$)=$ $$15,000,$ and COV $($X$,$Y$)=$ $$7,500$

If the weight of portfolio assets assigned to investment X is $80\%,$ the standard deviation of investment X is $$9,000$

True

False