Subject

Mathematics

Class

CBSE Class 12

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.
Advertisement

 Multiple Choice QuestionsShort Answer Type

21. Find space colon integral fraction numerator straight x squared plus straight x plus 1 over denominator left parenthesis straight x squared plus 1 right parenthesis left parenthesis straight x plus 2 right parenthesis end fraction dx
1137 Views

22. Evaluate space colon space integral subscript negative 2 end subscript superscript 2 fraction numerator straight x squared over denominator 1 plus 5 to the power of straight x end fraction dx.
799 Views

23. Find colon space integral left parenthesis straight x plus 3 right parenthesis square root of 3 minus 4 straight x minus straight x squared space end root space dx.
693 Views

24.

Find the particular solution of the differential equation
dy over dx equals negative fraction numerator x plus y space c o s space x over denominator 1 plus s i n space x space end fraction space g i v e n space t h a t space y equals 1 space w h e n space x equals 0

1130 Views

Advertisement
25.

Find the particular solution of the differential equation

2yex/y dx+ (Y-2xex/y) dy =0

Given that x=0 when y=1.

761 Views

26.

Find the coordinates of the foot of perpendicular drawn from the point A
(-1,8,4) to the line joining the points B(0,-1,3) and C(2,-3,-1). Hence find the image of the point A in the line BC.

1957 Views

27.

A bag X contains 4 white balls and 2 black balls, while another bag Y contains 3 white balls and 3 black balls. Two balls are drawn (without replacement) at random from one of the bags and were found to be one white and one black. Find the probability that the balls were drawn from bag Y.

1714 Views

Advertisement

28.

A and B throw a pair of dice alternately, till one of them gets a total of 10 and wins the game. Find their respective probabilities of winning, if A starts first.


Probabilities space left parenthesis Win right parenthesis equals space 3 over 36 space equals 1 over 12

Probabilities space left parenthesis lose right parenthesis space equals space 33 over 36 space equals space 11 over 12

straight P left parenthesis straight A space wins right parenthesis space equals space 1 over 12 plus 11 over 12 space straight x 11 over 12 space straight x 1 over 12 plus open parentheses 11 over 12 close parentheses to the power of 4 space straight x 1 over 12 plus........

straight a space equals 1 over 12 space straight r space equals 121 over 144

By space using space the space formula space of space inifinite space straight G. straight P.

straight P left parenthesis straight A space wins right parenthesis space equals fraction numerator begin display style 1 over 12 end style over denominator 1 minus begin display style 121 over 144 end style end fraction space space equals space 12 over 23
1883 Views

Advertisement
Advertisement

 Multiple Choice QuestionsLong Answer Type

29.

Three numbers are selected at random (without replacement) from first six positive integers. Let X denote the largest of the three numbers obtained. Find the probability distribution of X.Also, find the mean and variance of the distribution.

2275 Views

30.

Using the method of integration, find the area of the triangular region whose vertices are (2, -2), (4, 3) and (1, 2).

1133 Views

Advertisement