Go Back   2018-2019 StudyChaCha > StudyChaCha Discussion Forum > General Topics




  #2  
Old January 2nd, 2014, 01:25 PM
Super Moderator
 
Join Date: Jun 2013
Posts: 42,978
Default Re: Maths problems of 12th Class

Here I am giving you question paper for the mathematics subject of CBSE in a PDF attached with it so you can get it easily.

Some questions are given below :

SECTION - A
Q.1. If A is a square matrix of order 3 such that |adj A| = 64, find |A|.
Q.2. If A, B, C are three non zero square matrices of same order, find the condition on A such that AB = AC ⇒ B = C
Q.3. Give an example of two non zero 2 × 2 matrices A, B such that AB = 0.
Q.4. If f (1) = 4; f ′ (1) = 2, find the value of the derivative of log f(ex) w.r.t x at the point x = 0.
Q.5. Find a, for which f(x) = a(x + sin x) + a is increasing.
Q.9. A four digit number is formed using the digits 1, 2, 3, 5 with no repetitions. Find the probability that the number
is divisible by 5.
Q.10. The probability that an event happens in one trial of an experiment is 0.4. Three independent trials of the
experiment are performed. Find the probability that the event happens at least once.

Q.21. In a bolt factory machines, A, B and C manufacture respectively 25%, 35% and 40% of the total bolts. Of their
output 5, 4 and 2 percent are respectively defective bolts. A bolt is drawn at random from the product.
(i) What is the probability that the bolt drawn is defective ?
(ii) If the bolt is found to be defective find the probability that it is a product of machine B.
Q.22. Two dice are thrown simultaneously. Let X denote the number of sixes, find the probability distribution of X.
Also find the mean and variance of X, using the probability distribution table.
Q.24. A window has the shape of a rectangle surmounted by an equilateral triangle. If the perimeter of the
window is 12m, find the dimensions of the rectangle that will produce the largest area of the window.
Q.25. Make a rough sketch of the region given below and find it’s area using integration
( ) { } 9 y 4 x 4 , x 4 y ; , 2 2 2 ≤ + ≤ y x

Q.26. Every gram of wheat provides 0.1 gm of proteins and 0.25 gm of carbohydrates. The corresponding values for
rice are 0.05 gm and 0.5 gm respectively. Wheat costs Rs. 4 per kg and rice Rs. 6 per kg. The minimum daily
requirements of proteins and carbohydrates for an average child are 50 gms and 200 gms respectively. In what
quantities should wheat and rice be mixed in the daily diet to provide minimum daily requirements of proteins
and carbohydrates at minimum cost. Frame an L.P.P. and solve it graphically.
Attached Files
File Type: pdf CBSE mathematics question paper.pdf (31.4 KB, 24 views)
File Type: pdf CBSE mathematics question paper 1.pdf (490.4 KB, 36 views)
__________________
Answered By StudyChaCha Member
Reply With Quote Quick reply to this message
Our Latest Videos
Sponsored Links






















  #3  
Old December 12th, 2014, 04:59 PM
Super Moderator
 
Join Date: Dec 2012
Posts: 19,419
Default Re: Maths problems of 12th Class

As you want to get some tips for solving Maths problems of 12th Class so here I am giving you some tips:

You should learn formulas firstly because in maths formulas are most important thing for solving questions.

You should do practice according to formulas.

You should make good notes for the theoretical part.

You should concern about your problems to your maths teacher.

You should Review your Errors which you are doing again and again.

You should understand these topics in which you have doubts.

Maths requires time and patience to becoming a master of maths so you should keep patience.

You should do practice last year question papers.

Here I am giving you one attachment:

CBSE 12th Mathematics Question Paper






Attached Files
File Type: pdf CBSE 12th Mathematics Question Paper.pdf (226.4 KB, 21 views)
__________________
Answered By StudyChaCha Member
Reply With Quote Quick reply to this message
Reply


Reply to this Question / Ask Another Question
Your Username: Click here to log in

Message:
Options

Forum Jump


All times are GMT +6.5. The time now is 05:23 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Search Engine Friendly URLs by vBSEO 3.6.0 PL2

1 2 3 4 5 6 7 8 9