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Grade: 11
        How many four digit natural numbers not exceeding 4321 can be formed with the digits 1,2,3,4 if digits can repeat
one year ago

Answers : (1)

Vikas TU
6869 Points
							
If numbers can repeat then
total combination would be => 2^4 = 256.
Now just subtract the no. of possibilites which are greater than 4321.
And hence that would be => 27.
Hence,
nos can be formed => 256 – 27 = > 229.
one year ago
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