Deriving Mean Return from mean excess return - practice exam question

CFA Level I
#1

I have a question that is as follows: Mean excess return 7.4% Std. Deviation of annual returns: 15.7% Portfolio Beta 1.2 what is the coefficient of variation. I know that it is std. deviation divided by mean returns but how do i derive mean returns. thanks

#2

isn’t that 7.4%?

#3

no apparently its 12.8 in the answers i have

#4

let me clairfy: answer states that 15.7 divided by 12.8 = 1.23. dont know how to get the 12.8 though

#5

i feel like there isnt enough info here. anyone else…

#6

I think you are missing risk free rate.

#7

i think so as well, thanks for the vote of confidence