Expected return from Tech.com
=[-20*.3]+[15*.2]+[30*.35]+[50*.15]
                                           Â
= 15%
Expected return from sam grocery :
[5*.3]+[6*.2]+[8*.35]+[10*.15]
                                     Â
= 7%
Expected return from s&p (market)
=[-4*.3]+[11*.20]+[17*.35]+[27*.15]=11%
Required return from tech.com :Rf+[Beta(Rm-Rf)]
                          Â
= 5+ [1.68(11*5)]
                          Â
= 5+ [1.68*6]
                          Â
= 5+ 10.08
                          Â
= 15.08%
Required return from sam 5 +[.52(11-5)].
                  Â
= 5+ [.52 *6]
                   Â
= 5+ 3.12
                       Â
= 8.12%
since Both stock are yielding more than there expected return
,both are acceptable.However we will prefer most \"Sam grocery\"as it
is yielding more by 1.12% than expected [8.12-7] as against
Tech.com by .08% [15.08-15]