Question

in a true false test consisting 20 questions a student is to be rewarded for every correct answer 2 and -2for every wrong answer and 0 for not supplying answer. if a student secures 34 marks in atest. what are the possibilities of his making correct or incorrect answers​

Answer 1

Answer:

17 right answers

Step-by-step explanation:

if all qs were correct marks got would be=20×2=40

but marks he got=34

therfore right ans would be=34/2=17

Answer 2

Answer:

4 possibilities are there.

Step-by-step explanation:

possibility 1: 17 correct and 0 incorrect answer= (17×2)+[0×(-2)]= 34-0=34

possibility 2: 18correct and 1 incorrect answer= (18×2)+[1×(-2)]=36-2=34

possibility 3: 19 correct and 2 incorrect answer= (19×2)+[2×(-2)]= 38-4=34

possibility 4: 20 correct and 3 incorrect answer= (20×2)+[3×(-2)]= 40-6=34