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GalinKa [24]
2 years ago
7

Write in the missing numbers in each of these sequences. Explain the rule that has been used to make the sequence.

Mathematics
1 answer:
Vlad1618 [11]2 years ago
7 0

Answer:

28/ 8 , ( 25/8 ), 27/8 , (2.29/8 ) , 33/8, 39/8 , 41, 55

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<u>Step-by-step explanation:</u>

A Permutation is an ordered Combination. When the order does matter it is a Permutation. There are basically two types of permutation:

  • Repetition is Allowed: such as the lock above. It could be "333".
  • No Repetition: for example the first three people in a running race. You can't be first and second.

Formula is given by:

nC_r= \frac{n!}{r! (n-r)!} , where n is the number of things to choose from,  and we choose r of them,  no repetitions,  order matters. Here , n=13 , r=3.

⇒ 13C_3 = \frac{13!}{3!(13-3)!}

⇒ 13C_3 = \frac{13!}{3!(10)!}

⇒ 13C_3 = \frac{13(12)(11)10!}{3(2)(1)(10)!}

⇒ 13C_3 = 13(2)(11)

⇒ 13 C_3 = 286

∴ Number of ways to select 3 books from 13 books for adoption is 286 .

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3 years ago
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Answer:

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3 years ago
What is 4x less than or equal to 12
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3 x 4 is equal to 12 I think that’s your answer
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hi

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