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If you were to dial any 7 digits on a telephone in random
order, what is the probability that you will dial your own
phone number?
Assume that your telephone number is 7-digits.
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Answer Posted / george prasanna
I agree with Raju...
the seven positions are
- - - - - - -
first position (1-9)=9 ways
second position (0-9)=10 waya
third position (0-9)=10 waya
fourth position (0-9)=10 waya
fifth position (0-9)=10 waya
sixth position (0-9)=10 waya
seventh position (0-9)=10 waya
so one in 9x10^6 ways
so probability is 1/9000000
| Is This Answer Correct ? | 7 Yes | 3 No |
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