question_answer

If 'a' denotes '+'b' denotes \['\div '\]'c' denotes \['-'\]and 'd' denotes \['\times '\], then find the value of 28b7d8c6a4. (SOF NCO 2017)

A)  \[\frac{-3}{2}\]                        

B)  32                               

C)  30                               

D)  34