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Permutations And Combinations (view source)
Revision as of 10:04, 12 August 2014
, 10:04, 12 August 2014→Hints for difficult problems
= Hints for difficult problems =
= Hints for difficult problems =
'''1.How many 3-digits numbers can be formed from the digits 0,1,2,3 and 4 without repetition?'''[[Class10_permutations_and_combinations_problems#Problem_1|Solution]]<br>
'''1.How many 3-digits numbers can be formed from the digits 0,1,2,3 and 4 without repetition?'''[[Class10_permutations_and_combinations_problems#Problem_1|Solution]]
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'''2.How many 4-digit numbers can be formed using the digits 1,2,3,7,8 and 9 (repetations not allowed)'''<br>
'''2.How many 4-digit numbers can be formed using the digits 1,2,3,7,8 and 9 (repetations not allowed)'''<br>
#How many of these are less than 6000?<br>
#How many of these are less than 6000?<br>