MODERN PUBLICATION-PERMUTATIONS AND COMBINATIONS-EXERCISE
- How many numbers are there between 100 and 1000 such that at least one...
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- How many of them have exactly one of their digits as 7 ?
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- A mint prepares metallic calendars specifying months, dates and days i...
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- For a set of five true or false questions, no student has written all ...
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- How many automobile licence plates can be made if the inscription on e...
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- The Licence plates for vehicles registered in Delhi consist of 3 lette...
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- Evaluate : "^8P5.
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- Evaluate : "^10P3.
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- Evaluate : "^20P4.
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- Evaluate : "^75P2.
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- Find r if : ^5Pr= "^6P(r-1).
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- Find r if : "^10Pr= 2^9Pr.
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- Find the value of r if 5. ^4Pr= 6. "^5P(r-1).
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- Find r if "^5Pr =2 "^6P(r-1).
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- Find r if : P(11,r) = P(12,r-1)
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- Find r if : ^10P(r+1): "^11 P(r)= 30:11.
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- Find n if : "^(2n)P3=100 ^nP2.
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- Find n if : 30 ^nP6= "^(n+2)P7.
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- Find n if : 2^5P3= "^nP4.
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- Find n if "^(n-1)P3 : "^nP4 =1:9.
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