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 / sabarish
nos with 7 from 100 to 200 = 107,117,127,....197 and 170.
so 11.
like wise from 200 to 300 it is 11.
therefore...8 * 11 = 88.
total nos=899.
prob without 7's =1-88/899= 0.902 approx
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