The first digit of the password can be any of the ten digits - 10 possibilities.
A digit cannot be repeated, so the second digit can be any digit except the one you chose for the first digit - 9 possibilities.
The third digit can be any digit except the digits you chose for the first and second digit - 8 possibilities.
Using the rule of product:

There are 720 passwords.
Answer:

Step-by-step explanation:
In the geometric series:

The nth term of the geometric sequence can be calculated using formula

In your case, n = 10, then

The answer to question is whether you want me some of your questions about the question of the answer to answer question i question is the B.
√84= √4•√21= final answer is
±2√21
★ 100% of 15 = X


★ 20% of 15 = Y



<u>Answers</u> : X = 15 and Y = 3