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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 / ankit kumar
Total numbers between 100 & 999 = 900 (including both)
Possible combinations for conaiting 7:
7** = 1x9x9=81
*7* = 8x1x9=72
**7 = 72
77* = 9
7*7 = 9
*77 = 8
777 = 1
Total = 252
Therefore probability = 252/900 or 7/25
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