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There will be only 24 selections containing at least one red ball out of a bag containing 4 red and 5 black balls. It is being given that the balls of the same colour are identical.

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Question

There will be only 24 selections containing at least one red ball out of a bag containing 4 red and 5 black balls. It is being given that the balls of the same colour are identical.

Options

  • True

  • False

MCQ
True or False
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Solution

This statement is True.

Explanation:

We have 4 red and 5 black balls in a box and atleast one red ball is to be drawn

∴ Number of selection = [(4 + 1)(5 + 1) – 1] – 5

= [5 × 6 – 1] – 5

= 29 – 5

= 24

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Chapter 7: Permutations and Combinations - Exercise [Page 127]

APPEARS IN

NCERT Exemplar Mathematics Exemplar [English] Class 11
Chapter 7 Permutations and Combinations
Exercise | Q 56 | Page 127

Video TutorialsVIEW ALL [1]

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