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- How many natural numbers less than 1000 can be formed form the digits ...
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- How many five digit telephone numbers can be constructed using the dig...
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- Find the number of ways in which 8 distinct toys can be distributed ...
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- Find the number of ways in which one can post 5 letters in 7letter ...
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- In how many ways can 5 different balls be distributed among three bo...
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- In how many ways can 7 letters be posted in 4 letter boxes?
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- In how many ways can 4 prizes be distributed among 5 students, when No...
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- There are 10 lamps in a hall. Each one of them can be switched on i...
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- Evaluate the following: \ ^5P3
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- Evaluate the following: 15(P3)
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- Evaluate the following:5(P5)
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- if 5(p r)=6(p (r-1)) find r.
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- If 10(Pr)=5040 , find the value of rdot
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- If ^0P5+5^9P4=^(10)Pr , find the value of rdot
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- Prove the following: P(n , n)=2P(n , n-2)
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- Prove the following: P(n , r)=P(n-1, r)+rdotP(n-1,\ r-1)
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- Prove the following: n(Pn)= n(P(n−1))
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- Prove the following: P(n , r)=ndotP(n-1,\ r-1)
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- In how many ways three different rings can be worn in four fingers wit...
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- How many different signals can be made by 5 flags from 8 flags of d...
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