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Maha
  • Member for 6 years, 3 months
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12 votes
2 answers
9k views

Applying law of total probability to conditional probability

6 votes
8 answers
121 views

How to prove $\binom{n+2}{2}-\binom{n-1}{2}=3n$?

4 votes
1 answer
1k views

Distributing n different items to r different people with everyone getting at least one item

3 votes
2 answers
3k views

Correct logic of permuting 5 men and 5 women to find probability of different highest women rank

3 votes
1 answer
244 views

Inclusion exclusion for distributing distinguishable items to indistinguishable groups

3 votes
2 answers
215 views

Understanding different approaches to solve same probability problem

3 votes
2 answers
833 views

Understanding solution to probability problem

3 votes
2 answers
8k views

Number of bit strings of length four do not have two consecutive 1s

2 votes
3 answers
1k views

In how many ways can 20 persons be seated round a table if there are 9 chairs?

2 votes
2 answers
189 views

Is following tautology: $((A∧B)→C)≡((A→C)∨(B→C))$

2 votes
0 answers
214 views

How many five digit numbers can be formed from the integers 1,2,..,9 with one digit appearing at max thrice?

2 votes
1 answer
1k views

How to determine if given lattice is distributive or not?

2 votes
1 answer
55 views

Is there any "intuitive" logical or double counting proof to this combinatorial identity

2 votes
1 answer
245 views

Transition function of non deterministic pushdown automata

2 votes
1 answer
179 views

Is $A\odot B\odot C = A\oplus B\oplus C$?

2 votes
2 answers
797 views

Problem related to probability from Sheldon Ross' book

2 votes
2 answers
287 views

Understanding solution to the probability problem from Sheldon Ross' book

2 votes
3 answers
2k views

What is negation of tautology?

2 votes
1 answer
873 views

Understanding connection between terms tautology, contradiction, contingent, satisfiable, unsatisfiable, valid and invalid

2 votes
3 answers
357 views

Evaluating correctness of various definitions of countable sets

2 votes
1 answer
603 views

Understanding solution of system of linear equations

2 votes
1 answer
854 views

Relation between independent sets and covers

1 vote
1 answer
820 views

Sum of sizes of vertex cover and independent set

1 vote
2 answers
1k views

Are equivalence relations total, i.e. are all elements of an equivalence relation related one to each other?

1 vote
1 answer
45 views

Solving probability problem with complementation approach.

1 vote
2 answers
271 views

Alternative approach to solving probability problem

1 vote
1 answer
147 views

Number of ways to partition a set of $n$ indistinguishable items into $r$ groups

1 vote
1 answer
48 views

How can I distribute $n$ distinguishable items to $r$ indistinguishable groups such that...

1 vote
3 answers
200 views

Understanding distribution using Stirling number of the second kind inclusion exclusion approach

1 vote
1 answer
259 views

Proving combinatorical identity (total number of multichoose on n items)