You get 1 & -0.25 for each right and wrong answer. Answring 72 ques u get 47. How many ans were wrong?  Pick:	A) 10	B) 20	C) 25	D) 30	E) 35
let x be cort,thn 72-x are wrong.   x(1)+(72-x)(-1/4)=47   x=52,72-52=20.   so,20 are wrong.   ANSWER:20
<result>B</result>
You get 1 & -0.25 for each right and wrong answer. Answring 72 ques u get 47. How many ans were wrong?