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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 / satheshramasamy
no 0f 7's in 100 to 200 is
107,117,127,137,147,157,167,170,171,172,173,174,175,176,177,
178,179,187,197.
so totally 20 7's in 100-200.
so totally we have (20*9 +1) sevens b/w 100-999.totalling
181.
therefore prob is 181/((999-100)+2)=181/901=0.2009
| Is This Answer Correct ? | 2 Yes | 16 No |
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