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Choose the correct alternative:The number of five digit telephone numbers having at least one of their digits repeated i

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प्रश्न

Choose the correct alternative:
The number of five digit telephone numbers having at least one of their digits repeated i

पर्याय

  • 90000

  • 10000

  • 30240

  • 69760

MCQ
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उत्तर

69760

shaalaa.com
  या प्रश्नात किंवा उत्तरात काही त्रुटी आहे का?
पाठ 4: Combinatorics and Mathematical Induction - Exercise 4.5 [पृष्ठ १९७]

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सामाचीर कलवी Mathematics - Volume 1 and 2 [English] Class 11 TN Board
पाठ 4 Combinatorics and Mathematical Induction
Exercise 4.5 | Q 8 | पृष्ठ १९७

संबंधित प्रश्‍न

A Signal is generated from 2 flags by putting one flag above the other. If 4 flags of different colours are available, how many different signals can be generated?


How many three-digit numbers can be formed from the digits 0, 1, 3, 5, 6 if repetitions of digits are allowed?


How many three-digit numbers can be formed using the digits 2, 3, 4, 5, 6 if digits can be repeated?


How many numbers between 100 and 1000 have the digit 7 exactly once?


How many numbers formed with the digits 0, 1, 2, 5, 7, 8 will fall between 13 and 1000 if digits can be repeated?


In how many ways 5 persons can be seated in a row?


How many numbers are there between 1 and 1000 (both inclusive) which are divisible neither by 2 nor by 5?


How many strings can be formed using the letters of the word LOTUS if the word either starts with L or ends with S?


Count the total number of ways of answering 6 objective type questions, each question having 4 choices


Find the value of 6!


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Find the value of `(12!)/(9! xx 3!)`


Evaluate `("n"!)/("r"!("n" - "r")!)` when n = 10, r = 3


Find the value of n if `1/(8!) + 1/(9!) = "n"/(10!)`


Choose the correct alternative:
There are 10 points in a plane and 4 of them are collinear. The number of straight lines joining any two points is


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(i) Each of the smaller triangle is to be painted with one of three colours: red, blue or green.
(ii) No two adjacent regions have the same colour.


Find the number of positive integers greater than 6000 and less than 7000 which are divisible by 5, provided that no digit is to be repeated.


The number of possible outcomes when a coin is tossed 6 times is ______.


The number of different four-digit numbers that can be formed with the digits 2, 3, 4, 7 and using each digit only once is ______.


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