Ask Questions, Get Answers
Menu
X
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
studyplans
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
CBSE XII
Math
JEEMAIN
Math
Physics
Chemistry
Practice Test Series
CBSE XI
Math
NEET
Physics
Chemistry
Biology - XII
Biology - XI
Olympiad class V
Math - 5 Test Series
Olympiad class VI
Math - 5 Test Series
mobile
exams
ask
sample papers
tutors
pricing
login
X
ASK
Home
>>
JEEMAIN and NEET
>>
Mathematics
>>
Class11
>>
Permutations and Combinations
Find the number of rectangles in the figure.
jeemain
math
class11
ch7
permutations-and-combinations
combinations
medium
Share
asked
Aug 20, 2013
by
rvidyagovindarajan_1
retagged
Aug 6, 2014
by
sharmaaparna1
Please
log in
or
register
to add a comment.
Please
log in
or
register
to answer this question.
1 Answer
There are 5 vertical parallel lines and 4 horizontal parallel lines.
At a time two vertical lines and two horizontal lines are to be selected
to form a rectangle.
$\therefore$ No. of rectangles = $^5C_2.^4C_2$
$=10\times 6=60$
answered
Aug 20, 2013
by
rvidyagovindarajan_1
edited
Dec 20, 2013
by
meenakshi.p
Please
log in
or
register
to add a comment.
Related questions
The no. of rectangles in a chess board is ?
jeemain
math
class11
ch7
permutations-and-combinations
combinations
easy
asked
Aug 27, 2013
by
rvidyagovindarajan_1
1
answer
There are 9 Judges in a beauty contest. A particular candidate is selected as the winner if she gets maximum number of votes in favour. In how many ways a particular candidate is declared the winner?
jeemain
math
class11
ch7
permutations-and-combinations
combinations
medium
asked
Sep 6, 2013
by
rvidyagovindarajan_1
1
answer
A bag contains 3 black 4 white and 2 red balls, all balls being different. The number of selection of at the most 6 balls so that each selection has balls of all the 3 colours is ?
jeemain
math
class11
ch7
permutations-and-combinations
combinations
medium
asked
Sep 5, 2013
by
rvidyagovindarajan_1
1
answer
The total number of 4 digit numbers in which the digits are in descending order is ?
jeemain
math
class11
ch7
permutations-and-combinations
combinations
medium
asked
Sep 3, 2013
by
rvidyagovindarajan_1
1
answer
How many 7 digit numbers are there using the digits,1,2,3 and '2' should occur 2 times in each of the number?
jeemain
math
class11
ch7
permutations-and-combinations
combinations
medium
asked
Sep 3, 2013
by
rvidyagovindarajan_1
1
answer
The number of ways in which a cricket team of eleven players can be selected from 22 players which includes a particular two and excludes a particular 4 players is
jeemain
math
class11
ch7
permutations-and-combinations
combinations
medium
asked
Aug 14, 2013
by
rvidyagovindarajan_1
1
answer
In an election no. of candidates exceeds the number to be elected by 2. If a man can vote in 56 ways, then the no. of candidates is
jeemain
math
class11
ch7
permutations-and-combinations
combinations
difficult
asked
Aug 27, 2013
by
rvidyagovindarajan_1
1
answer
Ask Question
Tag:
Math
Phy
Chem
Bio
Other
SUBMIT QUESTION
►
Please Wait
Take Test
JEEMAIN Crash Practice
15 Test Series
NEET Crash Practice
15 Test Series
JEEMAIN
350+ TESTS
NEET
320+ TESTS
CBSE XI MATH
50+ TESTS
CBSE XII MATH
80+ TESTS
...