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Finger [1]
4 years ago
13

There are 24 books on the bookcase 3/4 of these books are science fiction how many books are science fiction

Mathematics
1 answer:
jok3333 [9.3K]4 years ago
7 0

Answer:

<u>18 of the books are science fiction.</u>

Step-by-step explanation:

24/4 = 6

Science fiction - 6+6+6 = 18

Not science fiction - 24 - 18 = 6

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Step-by-step explanation: Let 'a' be the first term and 'd' be the common difference of the given arithmetic progression (A.P.).

According to the given information, A.P. is {0, 4, 8, 12, 16, . . .}, i.e., a=0 and d=4.

The sum of first n terms is given by

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S_9=\dfrac{9}{2}\{2\times 0+(9-1)\times4\}=\dfrac{9}{2}(8\times 4)=144.

Thus, the required sum is 144.


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