Statistics Problem 2

Discussion in 'General Chat' started by super9xman, Jul 17, 2008.

  1. #1
    Seventeen equal -Length rodas join startville and Enderton. Five of the rodas pass through Midway City, seven pass through Central City and three pass through both. If twelve families travel from startville to Enderton using a randomly selected route:

    A) What is the probability that none of the familes pass through Central City?


    B) What is the probability that at least one of the families passes through both Midway and Central?

    C) What is the probability that only one family arrives in Enderton having passed through Midway City?

    D) What is the mean number of families that will pass through Midway?


    E) What is the standard deviation of the number of families that will pass through both Midway and Central?


    Can anyone solve this?
     
    super9xman, Jul 17, 2008 IP