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.
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 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
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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

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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

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.

1883 Views

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 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

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30.

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



Equation space of space line space AB colon negative
space straight y plus 2 space equals fraction numerator 2 plus 3 over denominator 2 end fraction left parenthesis straight x minus 2 right parenthesis
rightwards double arrow space 2 straight y space equals space 5 straight x minus 14
Equation space of space line space BC colon negative
straight y minus 3 space equals 1 half left parenthesis straight x minus 4 right parenthesis
rightwards double arrow space 3 straight y space equals space straight x plus 5
Equation space of space line space CA colon negative
left parenthesis straight y minus 2 right parenthesis space equals negative 4 left parenthesis straight x minus 1 right parenthesis
4 straight x plus straight y equals 6
therefore space ar space left parenthesis increment ABC right parenthesis
equals integral subscript negative 2 end subscript superscript 3 fraction numerator space 2 straight y space plus 14 over denominator 5 end fraction space dy minus integral subscript 2 superscript 3 3 straight y minus 5 dy space minus integral subscript negative 2 end subscript superscript 2 fraction numerator 6 minus straight y over denominator 4 space end fraction dy
equals 75 over 5 minus 5 over 2 minus 24 over 4
equals fraction numerator 300 minus 120 minus 50 over denominator 20 end fraction space equals space 130 over 20
space equals 13 over 2 space sq. space units
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