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if a number is choosen between 100 and 999 includeing these
numberrs what is the provbabilty that the number selected
does not contain a 7 is
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Answer Posted / fayaz
no.of numbers having 7 between 100 & 999 (inclusive)=280(by combination)
total numbers between 100& 999(inclusive)=900
probability of having 7 in the chosen no.=280/900=.311
thus probability of not having 7 in chosen no.=1-.311=0.688
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