Solve the question of and select the option from the choices A through D/E. Check your Answer and view the explanation.
Let the numbers be a, b and c. Then, a2 + b2 + c2 = 138 and (ab + bc + ca) = 131 (a + b + c)2 = a2 + b2 + c2 + 2(ab+bc+ca) (a + b + c)2 = 138 + 2 x 131 = 400 (a+b+c)2 = 400 (a + b + c) = 400 =20.