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Mathematics 20 Online
OpenStudy (anonymous):

whoever helps me will get a ribbon :) Elliot is taking a four question multiple choice test. Each question has four possible answers. He is going to completely guess on each question and he will get 5 points for every correct answer and lose two points for every incorrect answer. How many points can he expect to earn on the test (round to the nearest whole number)? A) -8 B) -1 C) 8 D) 20

OpenStudy (anonymous):

B -1

OpenStudy (anonymous):

@devinthedev it says whole number so the only possible answer is D - 20 (8 is not possible)

OpenStudy (anonymous):

There's a 25% chance of getting it right so on one question he would get 5 points and the other 3 questions he would get wrong so you subtract 2 for each of the 3 questions and you would get -1.

OpenStudy (anonymous):

but round to nearest whole number would then mean 0 isnt it @devinthedev ?

OpenStudy (anonymous):

Yeah but thats not one of the choices. Maybe there was a typo and they put whole numbers on accident. -1 is clearly the answer though. I had to read it a few times :-)

OpenStudy (anonymous):

@luckythebest

OpenStudy (anonymous):

@devinthedev but if by chance, he gets all 4 guesses right so won't it be 20/20 which is a whole number?

OpenStudy (anonymous):

a whole number can also be negative though

OpenStudy (anonymous):

@megen505 that is the POINT. A whole number is NOT negative. Whole number series starts from 0,1,2,3,4,5,6, .... which does NOT include negative numbers. The set of numbers including negatives is called INTEGERS, not whole numbers.

OpenStudy (anonymous):

There's only a 25% chance of getting it right out of 4 not 100% if he was guessing. lol

OpenStudy (anonymous):

well sometimes luck favours the brave? :P

OpenStudy (anonymous):

but it does say... "completely guess"

OpenStudy (anonymous):

lol. Maybe the round to the nearest whole number part applied to another question

OpenStudy (anonymous):

I still think my answer is correct. What do you guys think?

OpenStudy (anonymous):

@devinthedev lol even i wud think my ans is correct na :P

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