Dina purchased PRAN candy for Tk. 00 per box and BINGO candy for Tk. 50 per box. If she purchased a total of 12 boxes of candy for Tk. 00, how many boxes of PRAN candies did she purchase?

A 3

B 4

C 5

D 7

Correct Answer: Option E

suppose, he bought pran x box he bought bingo (12-x) box here, 4x+2.5(12-x)=42 or, x =8 he bought 8 boxes of pran candies