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Class 11
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Maths
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Mathematics
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Permutations and Combinations
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Permutations and combinations
permutations and combinations
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Exercise 7.1
Exercise 7.2
Exercise 7.3
Exercise 7.4
Miscellaneous Excercise
Exercise
How many words, with or without meaning can be made from the letters of the word
$MONDAY$
, assuming that no letter is repeated, if.
(i)
$4$
letters are used at a time.(ii) all letters are used at a time(iii) all letters are used but first letter is a vowel?
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How many
$4$
-digit numbers are there with no digit repeated?
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All letters are used at a time.
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How many
$3$
-digit even numbers can be made using the digits
$1,2,3,4,6,7$
if no digit is repeated?
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All letters are used but first letter is a vowel?
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How many
$3$
-digit numbers can be formed by using the digits
$1$
to
$9$
if no digit is repeated?
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How many words, with or without meaning, can be formed using all the letters of the word EQUATION, using each letter exactly once?
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From a committee of
$8$
persons, in how many ways can we choose a chairman and a vice chairman assuming one person can not hold more than one position?
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Find n if
$_{n−1}P_{3}:_{n}P_{4}=1:9$
.
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Find the number of
$4$
-digit even numbers that can be formed using the digits
$1,2,3,4,5$
if no digit is repeated. How many of those will be even?
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