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just olya [345]
3 years ago
8

The mean of nine numbers is 12 , if one of the numbers is removed ,

Mathematics
1 answer:
lys-0071 [83]3 years ago
8 0

Answer:

  • 4

Step-by-step explanation:

Mean of 9 numbers is 12.

<u>Total of 9 numbers:</u>

  • 9*12 = 108

Mean of 8 numbers is 13.

<u>Total of 8 numbers:</u>

  • 8*13 = 104

<u>Removed number:</u>

  • 108 - 104 = 4
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Permutation helps us to know the number of ways an object can be arranged in a particular manner. The correct option is D.

<h3>What are Permutation and Combination?</h3>

Permutation helps us to know the number of ways an object can be arranged in a particular manner. A permutation is denoted by 'P'.

The combination helps us to know the number of ways an object can be arranged without a particular manner. A combination is denoted by 'C'.

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Answer:

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