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What is the value of 8!/10! ?

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Math Expert
Joined: 02 Sep 2009
Posts: 58421
What is the value of 8!/10! ?  [#permalink]

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04 Mar 2019, 00:13
00:00

Difficulty:

15% (low)

Question Stats:

94% (00:36) correct 6% (00:38) wrong based on 31 sessions

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What is the value of 8!/10! ?

A. 4!/5!

B. 1/2!

C. 9!

D. 1/(5*6!)

E. 1/(15*3!)

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Joined: 29 Jan 2019
Posts: 1
Re: What is the value of 8!/10! ?  [#permalink]

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04 Mar 2019, 00:19
8!/10!= 1/10x9= 1/(1x2x3)x5x3
=1/15*3!

Ans E

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Re: What is the value of 8!/10! ?  [#permalink]

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04 Mar 2019, 01:06
Bunuel wrote:
What is the value of 8!/10! ?

A. 4!/5!

B. 1/2!

C. 9!

D. 1/(5*6!)

E. 1/(15*3!)

8!/10! = 1/90
which is
1/(15*3!)
IMO E
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Re: What is the value of 8!/10! ?  [#permalink]

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06 Mar 2019, 20:00
Bunuel wrote:
What is the value of 8!/10! ?

A. 4!/5!

B. 1/2!

C. 9!

D. 1/(5*6!)

E. 1/(15*3!)

8!/10! = 8!/(10 x 9 x 8!) = 1/90

Since 15*3! = 15 x 6 = 90, we see that choice E is equivalent to 1/90.

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Re: What is the value of 8!/10! ?   [#permalink] 06 Mar 2019, 20:00
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