Of the 220 books on a bookshelf, exactly 60 are nonfiction and 110 are hardcover. If 60% of the nonfiction books are hardcover, how many of the books are both not nonfiction and not hardcover?
A. 36
B. 50
C. 74
D. 86
E. 110

Question

Of the 220 books on a bookshelf, exactly 60 are nonfiction and 110 are hardcover. If 60% of the nonfiction books are hardcover, how many of the books are both not nonfiction and not hardcover?
A. 36
B. 50
C. 74
D. 86
E. 110

anonymous · Answer

@texaschic101

anonymous · Answer

Do you know how to answer, because I'm confused.

anonymous · Answer

Is this a serious question?

jigglypuff314 · Answer

yeah, he doesn't know how to do it.
I was the one who gave him this to keep him from posting stupid ones.

anonymous · Answer

I've tried to figure it out, but this is a hard one.

anonymous · Answer

Hint: apply the 60% to the number of nonfiction books.

texaschic101 · Answer

60% of 60 = .6(60) = 36 (60% of non-fiction are hardcover)
60 non fiction
110 + 36 are hardcover

110 + 36 + 60 = 206
220 - 206 = 14

I am not getting the right answer

anonymous · Answer

Then try to figure out how many remain when you subtract them out.

anonymous · Answer

That would be 36 @wio

texaschic101 · Answer

36 + 110 = 146
220 - 146 = 74 ??

jigglypuff314 · Answer

not 74

anonymous · Answer

The number that are hardcover OR nonfiction would be:
nonfiction + hardcover - nonfiction and hardcover.
You have to eliminate double counting.

Then you can finally find out how many are both not hardcover and not nonfiction.

anonymous · Answer

I still can't figure this out.

texaschic101 · Answer

60 are non fiction...of those 36 are hardcover
110 are hardcover

110 + 60 = 170
220 - 170 = 50 ??

texaschic101 · Answer

the 36 hardcover out of the non-fiction doesn't even matter because they are still non-fiction, right ?

texaschic101 · Answer

I can understand why you got confused

anonymous · Answer

So, 110+60=170.

.60*60=36

170-36=134

220-134=86

Did I get everything, @jigglypuff314?

anonymous · Answer

Okay
220 total
60 are nonfiction
110 are hardcover
60 * 0.60 = 36 are both nonfiction and hardcover
60 - 36 = 24 are nonfiction but not hardcover
24 + 110 = 134 are either nonfiction or hardcover
220 - 134 = 86 are neither nonfiction nor hardcover

jigglypuff314 · Answer

go @wio !!! :D

anonymous · Answer

Good job @wio.

texaschic101 · Answer

I was way off...my bad

anonymous · Answer

Can anybody give me a medal, I read it raises your smartscore.

texaschic101 · Answer

done deal :)

anonymous · Answer

Thanks! That was a tough question.

jigglypuff314 · Answer

I've got more if you want @OrangeMaster

anonymous · Answer

Thanks for the practice @jigglypuff314.

texaschic101 · Answer

I know...I got so confused. Wio makes it look so easy...lol

anonymous · Answer

Sure I guess one more.