# Maths Cheat Sheet Filetype PDF

## Maths Cheat Sheet Filetype PDF Summary

Dear readers, here we are offering Maths Cheat Sheet Filetype pdf to all of you. It is necessary to find their perimeter in questions related to running/laying wire around a rectangular/square/circular ground.
The ratio between the area of a square and that of another square drawn on the diagonal of the same square will be 1:2. The length of a square/rectangular chord is equal to the perimeter of that square or rectangle. The length of a circular chord is equal to the perimeter or circumference of that circle. The distance covered by a wheel in one revolution will be equal to the circumference of the circular wheel.

### Maths Cheat Sheet Filetype PDF

Sets

 ∈ “Is an element of…” ∪ Union: combine elements of A and B ∩ Inters­ection: elements that appear in both sets ⊄ Is not a subset of ⊆ Subset: all elements in A are in B ⊂ Proper Subset: A is a proper subset of B iff A is a subset of B and B is not equal to A ∅ Empty set { } Empty set {∅} Not an empty set A̅ Compli­ment: the set consisting of all element in U that are not in A Set builder notation {formula for elements| restri­ctions}

### Probab­ili­ty/­Stats

 Perms P(n,r) = n!/((n­−r)!) Combs C(n,r) = n!/(n−­r)!r! Sample Space Set of all possible outcomes Mean Sum of set divided by length of set Median Middle term of an organized Take the average of two terms if there is more than one middle term Mode The number that occurs most in a set σ² (Variance) Calculate the mean For each number, subtract the mean and square the result Calculate the average of the squared differ­ences, or sum up the squared differ­ences and divide by N, the number of values. σ (Standard Deviation) Square Root of Variance (σ²) 