Current Attempt in Progress

Suppose you have a portfolio that has $$210$ in stock A with a beta of $0\mathrm{.}96,$$$840$ in stock B with a beta of $1\mathrm{.}26,$ and $$630$ in the risk$-$free

asset. You have another $$420$ to invest. You wish to achieve a beta for your whole portfolio to be the same as the market beta.

What is the beta of the added security? $($Round intermediate calculations and the final answer to $3$ decimal places, e$.$g$.2\mathrm{.}361.)$

Beta

Attempts: $0$ of $2$ used.