number sys | |

What will be the sum of all the 5 digit numbers that can be formed with only odd digits 1,3,5,7,9 in following cases 1)Repetition of numbers allowed 2)Repetition of numbers not allowed? |

Re: number sys | |

Hi Sumit 1) 5 ^{4}(11111)(1+3+5+7+9)2) 4!(11111)(1+3+5+7+9) Kamal Lohia |

Re: number sys | |

Hi Kamal, I could not get the second part of the solution. Why 4!, shouldnt it be 5!. Pls explain. Sparkle |