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need the solution

x takes part in three subjects physics, chemistry and mathematics.Each of the subjects is of 100 marks.How many ways can he obtain 200 out of 300?
by kh ibrahim
Sat Jul 08, 2017 7:31 pm
 
Forum: Combinatorics
Topic: need the solution
Replies: 1
Views: 295

Re: regional mo 2015

Disclose the first approach
by kh ibrahim
Mon Dec 12, 2016 11:40 pm
 
Forum: Divisional Math Olympiad
Topic: regional mo 2015
Replies: 3
Views: 380

regional mo 2015

this is a problem of regional math olympiad 2015
by kh ibrahim
Sat Dec 10, 2016 12:49 pm
 
Forum: Divisional Math Olympiad
Topic: regional mo 2015
Replies: 3
Views: 380

Re: why I'm getting 2 answers contrary to each other

You said that my second result is not always true.So if it is true in some cases, then wont the theorem be wrong?
by kh ibrahim
Thu Oct 27, 2016 3:28 pm
 
Forum: Secondary Level
Topic: why I'm getting 2 answers contrary to each other
Replies: 4
Views: 391

Re: why I'm getting 2 answers contrary to each other

Perhaps, nobody is getting my question.In the attachment you can see I got two results but they are contrary.The theorem is sum of any two sides of a triangle is greater than twice of the median drawn to the third side.Firstly, I proved that.It was AB+AC>2AD.However, interesting thing was in the sec...
by kh ibrahim
Wed Oct 26, 2016 9:53 pm
 
Forum: Secondary Level
Topic: why I'm getting 2 answers contrary to each other
Replies: 4
Views: 391

why I'm getting 2 answers contrary to each other

It is an extra of general math on chapter 6.3
by kh ibrahim
Wed Oct 26, 2016 8:02 am
 
Forum: Secondary Level
Topic: why I'm getting 2 answers contrary to each other
Replies: 4
Views: 391

Re: external section formula

Lets talk out of vectors.Supposing if a point C divides a line segment AB externally what would it mean?Will it mean C is closer to A or B?Why would it mean so?
by kh ibrahim
Sun Oct 09, 2016 2:17 pm
 
Forum: Higher Secondary Level
Topic: external section formula
Replies: 6
Views: 578

Re: external section formula

How can a ratio be negative?Is it because of different direction?
by kh ibrahim
Fri Oct 07, 2016 1:12 pm
 
Forum: Higher Secondary Level
Topic: external section formula
Replies: 6
Views: 578

Re: external section formula

I don't know which is correct or why that would be correct.
by kh ibrahim
Fri Oct 07, 2016 2:41 am
 
Forum: Higher Secondary Level
Topic: external section formula
Replies: 6
Views: 578

Re: external section formula

the second part of that external section formula.
by kh ibrahim
Fri Oct 07, 2016 2:40 am
 
Forum: Higher Secondary Level
Topic: external section formula
Replies: 6
Views: 578
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