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  • The probability that a k-digit number does NOT contain the digits 0,5 or 9 isOption: 1 <img alt="0.3^k" src="https://entrancecorner.oncodecogs.com/gi

The probability that a k-digit number does NOT contain the digits 0,5 or 9 is

Option: 1

0.3^k


Option: 2

0.6^k


Option: 3

0.7^k


Option: 4

0.9^k


Answers (1)

best_answer

Favourable digits to form \mathrm{k}digit number \mathrm{= 7}
Hence, each place can be filled by 7 ways.

But digits are 10 .
\mathrm{\text{So, required Prob }=\left(\frac{7}{10}\right)^k}
 

Posted by

Sayak

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