hello

@user21820 I need help in a set problem

@AbhasKumarSinha Please read the description of a tag before anyhow using it, especially if someone has removed the tag (because it is a wrong tag for your question).

@user21820 sorry, but I don't understand why it's a probability question and not set theory

@user21820 can you please help me with the question??

@user21820 can you please help me??

@AbhasKumarSinha Again, read the tag description. The set-theory tag description says "This tag is for set theory topics typically studied at the advanced undergraduate or graduate level. These include cofinality, axioms of ZFC, axiom of choice, forcing, set-theoretic independence, large cardinals, models of set theory, ultrafilters, ultrapowers, constructible universe, inner model ... " Is there a single topic in that list that you understand?

@user21820 sorry, I tried but the tag description was not available in mobile view

@AbhasKumarSinha Then don't use the mobile view; use a proper browser.

@user21820 I think that it's now have been corrected, so can you please help me with Solution??

@AbhasKumarSinha I may help you, but repeatedly pestering me will decrease the likelihood of that. Firstly, you are going to have to attempt to follow lulu's hint. Namely start with "Looking at eye/ear we see that ≥50% lost both."

I didn't understand his approach ☹️

@AbhasKumarSinha She is saying that if you only use the information for eye+ear you can deduce that at least 50% lost both. Figure out why that is so.

Okay let me try that one

@user21820 would you mind elaborating it a bit? So, basically, intersection of eye and ears should be the minimum cardinality of those two sets, as far I know. So, it should be 10%, but his logic is 50% which I don't get....

Your logic does not make any sense. Don't try to do funny things like cardinality or intersection. Just use your common sense. The question tells you how many lost this and how many lost that. So at least how many lost both?

At least 10% lost both eye and ear, If my approach is correct.

I told you to discard your approach and use your common sense.

What to do with commonsense? (my common sense says to do practical things, but that's not how to solve a problem

)

If at least 7 of your toes are dirty and at least 8 of your toes are wet, at least how many of your toes are both dirty and wet?

@user21820 ohhhh I got it with your example 😊

Good logic 😉

Great.

Don't underestimate your common sense.

So, do you see how to continue the reasoning to include the other restrictions one by one?

← 26 messages moved from Logic

@AbhasKumarSinha: I've decided to move our conversation here. Please feel free to continue here!

Yes I can continue with others, I writing answer now 😊

@AbhasKumarSinha Great! Then others can check your work.

Yes

For future reference, we are talking about this post.

Great :)