MathsAreFun

5 Questions
12 Answers

0

678

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Please help...Thank you.

In how many ways can we place anywhere from to indistinguishable checkers on a checkerboard (no more than one checker per square), such that no row or column contains exactly checker?

MathsAreFun Apr 13, 2020

0

489

0

+41

Counting please help

How many subsets of have the property that there are at least two elements and the sum of the two largest elements is 13?

MathsAreFun Apr 13, 2020

-2

688

1

+41

Probability With Sets

Let . Three subsets of are chosen at random.
(a) Find the probability that
(b) Find the probability that .

Thank you!

MathsAreFun Apr 1, 2020

-1

621

8

+41

Geometry/Probability Problem

In triangle , we have , , and .
Let be a point chosen uniformly at random inside . Extend ray to hit side at . What is the probability that ?

Thank you!!! read more ..

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MathsAreFun Apr 1, 2020

-3

981

13

+41

i would like to understand how to solve, so that I can solve other problems on my own.

A regular dodecagon P_1, P_2, P_3, ... P_12 is inscribed in a circle with radius 1. Compute
(P_1 P_2)^2 + (P_1 P_3)^2 + ... + (P_11 P_12)^2. (The sum includes all terms of the form (P_i P_j)^2, where 1≤ i <read more ..

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MathsAreFun Mar 30, 2020