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Apr
22
comment The total number of seven digit numbers,the sum of whose digits is even are?
Seven digit no means seven digit integer number that has the digits whose sum is even lik....1234561=22(even).....i wanted to know how many number are lik that...i think i am clear now
Apr
22
comment The total number of seven digit numbers,the sum of whose digits is even are?
@user9325 I tild that thing to kevin just to puzzle him...that he is right but the way he think about the question is not the right logic......i have given my explanations just below..although i aalso explained that where i am stucked........
Apr
22
comment The total number of seven digit numbers,the sum of whose digits is even are?
I am confused with how to think about the summation of digit is even...here we are considering the whole digit as a even number ...but the quest is asking about No of seven digit number whose sum of digits are Even
Apr
22
asked The total number of seven digit numbers,the sum of whose digits is even are?
Apr
22
comment How many plates can be made?
at the same time they are concidring 001,003,004,089 are three digit number..thet is right..but they dont think 000 is anumber..i dont know why?
Apr
22
comment How many plates can be made?
i think they are considring 000 not a number
Apr
22
comment How many plates can be made?
i have a suspicion about the 1st question whether it will be 26*26*999 Or 26*26*1000.........I am not getting why the text book is used 999
Apr
22
awarded  Commentator
Apr
22
awarded  Scholar
Apr
22
accepted How many plates can be made?
Apr
22
comment How many plates can be made?
you are right at second question
Apr
22
comment How many plates can be made?
Ya ya for the 1st question answer should be 26*26*10*10*10 but given answer in text book is 26*26*999
Apr
22
comment How many plates can be made?
2)If No repetition then 26P2*10P3=468000
Apr
22
comment How many plates can be made?
1)if repetition then 26^2 *999 will be the answer...that is what i am geeting from textbook....do you think this answer is right?
Apr
22
comment Non-negative integral solutions of $X_1+X_2+X_3+X_4<n$
Please make me understood using more words
Apr
22
comment Non-negative integral solutions of $X_1+X_2+X_3+X_4<n$
I dont think so...
Apr
22
asked How many plates can be made?
Apr
22
awarded  Student
Apr
22
asked Non-negative integral solutions of $X_1+X_2+X_3+X_4<n$
Apr
21
comment Sum of Digits divided by 5 and 9?
Try out how can we generalize the divisiblity like you have done it for summation