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 / dayquest
total numbers from 100 to 999 = 900
total no of 7's
700 - 799 = 100
70-79 in all 100's except seventh hundred = 90
07,17,27...67,87,97 in
all 100's except seventh hundred = 90
total - 280
probability = (900-280)/900
= 31/45
| Is This Answer Correct ? | 12 Yes | 15 No |
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