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Maths Puzzle
Numerical Ability
Permutation and Combination
How many numbers grater than 2300 can be formed from digit 1,2,3,4,5?repetition not allowed
Read Solution (Total 1)
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- 2 cases are here
case1- when 2 occurs at thousand's place
thousand place can be filled up by 1 way
hundred place can be filled up by 3/4/5 in 3 ways
remaining 2 place can be filled by 5p2 ways
number of numbers in this case= 1*3*5p2=60
case-2 when anyone of 3,4,5 occurs at thousand place
thousand place can be filled up by 3,4,5 by 3 ways
remaining place can be filled up by 5p3
number of numbers formed in this case
3*5p3=180
required number=180+60=240 - 11 years agoHelpfull: Yes(0) No(1)
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