Acredit card contains 16 digits between 0 and 9. however, only 300 million numbers are valid. if a number is entered randomly, what is the probability that it is a valid number

The probability that a randomly entered number is valid will be 0.00000003

Explanation

From 0 to 9, there are total 10 digits and the credit card number should be of 16 digits.

So, the total possible 16 digit credit card numbers

Now, the valid numbers are only 300 millions

Thus, the probability that a randomly entered number is valid

19.

step-by-step explanation:

you add the 9 in the tens column since it is a single digit and 9 plus zero is 9 so it is 19