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permutation_concept

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Master | Next Rank: 500 Posts
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permutation_concept

by iwill » Mon Aug 31, 2009 9:15 am
Guys,

Can somebody explain the concept of box - letter concept.
Q. In how many ways can 8 letters be posted in 5 letter boxes ?


Thanks,
V
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Re: permutation_concept

by quant-master » Mon Aug 31, 2009 12:07 pm
iwill wrote:Guys,

Can somebody explain the concept of box - letter concept.
Q. In how many ways can 8 letters be posted in 5 letter boxes ?


Thanks,
V
Take letter 1 you can post it either in box 1 or 2 or 3 or 4 or 5 hence 5 ways
similarly letter 2 you can do it in 5 ways.....
letter 8 you can do it in 5 ways hence 5^8

Let me know if you have any questions

Thanks,
Quant-Master
https://gmat-quants.blocked - My Blog Updated almost daily with new quant fundas. Find collection of quants question in my blog
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