question_answer

If \[a+b+c=15\] & \[{{a}^{2}}+{{b}^{2}}+{{c}^{2}}=83,\] find the value of \[{{a}^{3}}+{{b}^{3}}+{{c}^{3}}\,-\,\,3abc\].

A)  120                             

B)  140

C)  160                             

D)  180

E)  None of these