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Showing posts from March, 2020

### Dictionary Rank of a Word | Permutations & Combinations

PERMUTATIONS & COMBINATIONS Rank of the word or Dictionary order of the English words like COMPUTER, COLLEGE, SUCCESS, SOCCER, RAIN, FATHER, etc. Dictionary Rank of a Word Method of finding the Rank (Dictionary Order) of the word  “R A I N” Given word: R A I N Total letters = 4 Letters in alphabetical order: A, I, N, R No. of words formed starting with A = 3! = 6 No. of words formed starting with I = 3! = 6 No. of words formed starting with N = 3! = 6 After N there is R which is required R ----- Required A ---- Required I ---- Required N ---- Required RAIN ----- 1 word   RANK OF THE WORD “R A I N” A….. = 3! = 6 I……. = 3! = 6 N….. = 3! = 6 R…A…I…N = 1 word 6 6 6 1 TOTAL 19 Rank of “R A I N” is 19 Method of finding the Rank (Dictionary Order) of the word  “F A T H E R” Given word is :  "F A T H E R" In alphabetical order: A, E, F, H, R, T Words beginni

### Online Classes For The Students

Online Classes For The Students Online classes of mathematics for the students of classes X, XI, XII. Explaining through NCERT book, NCERT sol, Self sol pdf and through ZOOM classes. A unique and different way of effective teaching   RMB DAV CENTENARY PUBLIC SCHOOL NAWANSHAHR For Teachers Use Only Mathematics Online Classes Click on the link (Image) Below to join online classes according to the following schedule RESOURCE CENTRE MATHEMATICS   DAV School Class 12  Subject : Maths. / Applied Maths. CLASS 12 (Non- Medical and Applied Mathematics Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11 Chapter 12 Chapter 13 Applied   Maths 👉 Complete NCERT Book with Solution   DAV School Class 11 Subject : Maths. /

### Math Assignment Ch-14 Class X | Statistics

Mathematics Assignment  Class X, Chapter 14 Extra questions of statistics class 10, chapter 14, Important and board based questions based on chapter 14 of class 10 Chapter: 14(Statistics) Formulas used to solve the Assignment on statistics

### Permutation and Combination Class XI Chapter 7

Permutation & Combination Class XI Chapter 7 Explanation of Formulas and basic points related to the permutation and combination class XI chapter 7, method of arrangement and selection of the objects. Fundamental Principal of Counting :   If an event can occur in m different ways, following which another event can occur in n different ways, then the total number of occurrence of the events in the given order is   m x n. This principal can be generalized for any finite number of terms.   If an event can occur in m different ways, following which another event can occur in n different ways, following which another event can occur in p different ways, and so on.   Then the total number of occurrence of the events in the given order is   m x n x p………….. For Example: A person have 3 pants and 2 shirts. How many different pairs of a pant and a shirt, can he dress up with? Sol. There are 3 ways to select the pant. He can either select pant P 1 , P 2 or P 3 . Si

### Determinants Class XII Chapter 4 : Formulas & Basics

Class XII : Chapter : 4 : Determinants Formulas and basic concepts based on the determinants chapter 4 class XII, properties of determinants, method of finding the solutions of linear equations by matrix method. Determinant:   To every square matrix A =  [a ij ]  of order n, we can associate a number (real or complex) called determinant of the square matrix  A.  Determinant of matrix [A] is denoted by |A| For Example:   Let a matrix A of order 2 x 2 is given by $A=\; \left [ \begin{matrix} a &b \\ c & d \end{matrix} \right ]$$Then \; \; \left |A \right | =\left | \begin{matrix} a &b \\ c & d \end{matrix} \right |= ad-cb$ Let a matrix of order  3 x 3 is given by :  $A=\begin{bmatrix} 3 &4 &5 \\ -2& 5 & -4\\ 3 & -1 & 5 \end{bmatrix}$ Determinant of matrix A is denoted by |A| and is given by $|A|=\begin{vmatrix} 3 &4 &5 \\ -2& 5 & -4\\ 3 & -1 & 5\end{vmatrix}$ Expand it along the first row  \[|A|= 3\beg