A contractor mixes concrete from bags of pre - mix for small jobs How many bags with 7% cement should he mix with 4 bags of 17% cement to produce a mix containing 11% cement ? A ) bags D) 15 bags B) 10 bags C ) 6 bags SHOW WORK
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amount of oatypop that contains the prize = 40%

amount   of oatypop which doesn't contain the prize = (100-40)=60%

probability that hannah will win a prize

    = s +f s +f f s+ff   f s+ff f f s+ infinity.where f= failure,s= success

=   or 60%

probability that hannah only has to buy 3 or less boxes before getting a prize= (s) and ( f s) and (ff s) and (f f f s)

        = = 87.04 %  

step-by-step explanation: