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Graham Kemp
  • Member for 8 years, 2 months
  • Last seen this week
125 votes
Accepted

What is the difference between independent and mutually exclusive events?

64 votes

Bayes' rule with 3 variables

44 votes

When to give up on a hard math problem?

33 votes
Accepted

The "assumption" in proof by induction

33 votes
Accepted

Is there any difference between $P$ and $\Pr$ to represent probabilities?

32 votes

Intuition for probability of drawing first ball = probability of drawing second ball

32 votes

In proofs, are "for each" and "for any" synonyms?

29 votes

In a proof by contradiction, what if both the proposition and its negation lead to contradictions?

27 votes

Given 10 white, 9 green and 7 black. In how many ways you can select one or more balls?

26 votes
Accepted

Total number of unordered pairs of disjoint subsets of S

22 votes

Probability of drawing the Jack of Hearts?

21 votes
Accepted

Proof of linearity for expectation given random variables are dependent

20 votes

High school Math: confusion about the basic probability

19 votes

How many words (i.e. not "math" symbols") should I use in my proofs? ${}{}$

18 votes
Accepted

Prove that $E(X) = \int_{0}^{\infty} P(X>x)\,dx = \int_{0}^{\infty} (1-F_X(x))\,dx$.

18 votes

Much less than, what does that mean?

18 votes
Accepted

Is this always true: $P(A|B) = 1-P(A^c|B)$?

17 votes
Accepted

Probability of Head in coin flip when coin is flipped two times

17 votes
Accepted

What is the difference between singular matrices and degenerate matrices?

16 votes

What does "dual" mean exactly in mathematics?

16 votes

Expected value of a non-negative random variable

15 votes

A coin is flipped ten times. What is the probability that the first three are heads if an equal number of heads and tails are flipped?

15 votes

Complement Set of Cartesian product

15 votes
Accepted

Simple Trig Equations - Why is it Wrong to Cancel Trig Terms?

15 votes

Unambiguous summation notation

15 votes
Accepted

Find joint distribution of minimum and maximum of iid random variables

14 votes
Accepted

Conditional expectation of random variable given a sum

14 votes
Accepted

Probability Density Function of Scaled Gamma Random Variable

14 votes
Accepted

Why, logically, is proof by contradiction valid?

14 votes

$4$ dogs have been born in the same week. What is the probability that they were born on different days?

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