11th Standard CBSE Syllabus & Materials
11th Standard CBSE
CBSE 11th Economics PART-A - Presentation of Data - New Sample Question Papers Study Material - QB365 Set A
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CBSE 11th Economics PART-A - Introduction to Economics and Statistics - New Sample Question Papers Study Material - QB365 Set A
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Published on: 27/05/2021
QB365 Provides the NCERT Exemplar Question Papers for Class 11 Maths , and also provide the detail solution for each and every ncert exemplar papers. Ncert Exemplar papers will help to get more idea about question pattern in every exams and also will help to get more marks in Exams
Download CBSE Class 11th Standard CBSE Mathematics question papers, sample papers, important questions, and previous year solved papers in PDF format. Get free study materials, NCERT solutions, and exam preparation resources for Class 11th Standard CBSE Mathematics
Questions + Answers key
Take MCQ Mathematics Test
1.
Three squaresof chess board are selected 2 squares of ane colour and other of a different colour.
2.
Suppose an integer from 1 through 1000 is chosen at random.Find the probability that the integer is a multiple of 2 or a multiple of 9.
3.
One card is drawn from a well-shuffled deck of 52 cards.Calculate the probability that the card will be
not a black card
4.
One card is drawn from a well-shuffled deck of 52 cards.Calculate the probability that the card will be
a black card
5.
One card is drawn from a well-shuffled deck of 52 cards.Calculate the probability that the card will be
an ace
1.
We know that, in a chess board, there are 64 squares of which 32 are white and 32 are black.
Clearly, 3 squares can be selected in \(^{ 64 }{ C }_{ 3 }\) ways.
Let E be the event of getting 2 squares of one colour and other of a different colour.
Then, n(E) = \(^{ 32 }{ C }_{ 2 }\times ^{ 32 }{ C }_{ 2 }+^{ 32 }{ C }_{ 1 }\times ^{ 32 }{ C }_{ 2 }\)
[ 2 squares of one colour and 1 of other can be 2w, 1B or 1w , 2B]
\(2\times ^{ 32 }{ C }_{ 2 }\times ^{ 32 }{ C }_{ 1 }\)
\(\frac { 16 }{ 21 } \)
2.
0.556
3.
\(\frac { 1 }{ 2 } \)
4.
\(\frac { 1 }{ 2 } \)
5.
\(\frac { 1 }{ 13 } \)
11th Standard CBSE Syllabus & Materials
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