Homework: practice problems-module 7 Save Score: 0.5 of 1 pt 1 of 7 (5 complete)
ID: 3283640 • Letter: H
Question
Homework: practice problems-module 7 Save Score: 0.5 of 1 pt 1 of 7 (5 complete) Score: 50%, 3.5 of 7 pts (%) 4.6.5 Queston Help A thief steals an ATM card and must randomly guess the correct three-digit pin code from a 9-key keypad. Repetition of digits is allowed. What is the probability of a correct guess on the first try? The number of possible codes is 729 Type an integer or fraction. Simplify your answer) The probability that the correct code is given on the first try is Type an integer or fraction, Simplify your answer.)Explanation / Answer
First digit can have one out of 9 numbers, second digit can also have one of the 9 numbers and similarly the third digit.
Number of possible code = 9×9×9 = 729
Out of 729 possibilities only one possibility is correct so probability that the correct code on first try = 1/729
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