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Sagot :
If a four digit personal identification number is selected, then the probability that there are no repeated digits is 0.504
Number of digits in the identification number = 4
0, 1, 2, 3, 4, 5, 6, 7, 8 and 9
There are 10 digits
The probability = Number of favorable outcomes / Total number of outcomes
Total number of outcomes = 10 × 10 × 10 × 10
= 10000
Number of outcomes that digits wont repeat = 10 × 9 × 8 × 7
= 5040
Substitute the values in the equation of probability
The probability = 5040 / 10000
= 0.504
Therefore, the probability there are no repeated digits is 0.504
Learn more about probability here
brainly.com/question/11234923
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