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• CBSE×
• Class 12 Science×
• Mathematics×
• Matrices×

# Matrices Free Doubts and Solutions

## Thankyou Mrs. Sneha Shidid .

Asked by Ashish 19th April 2017, 4:57 PM

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## A shopkeeper has 3 varieties of pens 'A','B' and 'C'. Meena purchased 1 pen of each variety for a total of Rs.21.Jeevan purchased 4 pens of 'A' variety, 3 pens of 'B' variety and 2 pens"c" variety for Rs.60. while Shika purchased 6 pens of 'A' variety, 2 pens of 'B' variety and 3 pens of 'C' variety for Rs.70. Using matrix method, find cost of each variety of pen.(HOW TO SOLVE THIS QUESTION)

Asked by reach2abhijeetsingh 6th August 2016, 5:08 PM

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## Find number of solutions of the system of equations 2x+y-z=7, x-3y+2z=1,x+4y-3z=5.. Also tell the conditions to solve such martices problems.please give any short method for quick solution.

Asked by rakshitreshu1997 7th September 2015, 7:02 PM

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## What are Augumented matrices? And how to solve them.explain by giving example

Asked by rakshitreshu1997 5th September 2015, 5:49 PM

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## How to perform elementary operations on matrices ?

Asked by jyotigupta171 9th June 2015, 7:20 PM

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## can you solve this using matrices ?

Asked by Manisha Behera 20th March 2015, 2:38 PM

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## To raise money for an orphanage, students of three schools A, B, C organised an exhibition in their locatlity,where they sold paper bags, scrap-books and pastel sheets made by them using recycled paper, at rate of Rs. 20,Rs.15 and Rs.5 per unit respectively.School A sold 25 paper-bags,12 scrap-books and 34 pastel sheets while. School B sold 22 paper-bags,15 scrap-books and 28 pastel sheets while School C sold 26 paper-bags,18 scrap-books and 36 pastel sheets. Using matrices, find the total amount raised by each school.

Asked by gsonu953 1st February 2015, 11:52 AM

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## using matrices solve :                                   2x + 3y + 32 = 5                                 x - 2y + 2 = -4                                 3x - y - 22 = 3

Asked by Lochana Jayachandran 5th October 2014, 7:15 PM