If a * b = a + b/ab , find the value of 5 * (5 * -2) :
Choices
A) -3  B) -10  C) -1.66  D) 3/5  E) -12
(5 * -2) = (5 x (-2))/(5 + (-2)) = -10/3   So, 5 * (5 * -2) = 5 * (-10/3) = (5 * (-10/3))/(5 + (-10/3))   = (-50/3) * (3/5)   = -10.   ANSWER:-10
<result>B</result>
If a * b = a + b/ab , find the value of 5 * (5 * -2) :