question_answer

If \[a\otimes b=\frac{a+b}{2}\] and \[a(-)b=\frac{2a+b}{3}\], then what is the value of\[\left( 4\otimes 6 \right)(-)\left( 12\otimes 4 \right)\]?                                                                                                                                                       (SOF NSO 2016)

A)  4                                

B)  6             

C)  8                                

D)  10