Question

In a true -false test containing 50 questions ,a student is to be awarded 2 marks for every correct answer, -2 for every incorrect answer and zero for not attempting any question.if yash secured 94 marks in a test, what are the possibilities of his marking correct and wrong answer?

Answer 1

Answer:

correct 47 wrong 0

correct 48 wrong 1

Step-by-step explanation:

let correct answers=x

wrong answers=y

then 2x-2y=94

x-y=47

x=y+47

y=0,x=47

y=1 x=48

if x=2 then y=49 and 49+2=51>50

so only two possibilities are:\

correct 47 wrong 0

correct 48 wrong 1

ia there

correct 48