PLZ HELP I DONT UNDERSTAND A password for a security system must consist of a eater followed by two digits. How many possible pa

Question

2 years ago

8

sswords are there?

1 answer:

Talja [164] · Answer 1 · 2022-04-21T01:48:18+03:00

Answer:

7020

Step-by-step explanation:

The letter could be any 1 of the 26 and it could be placed in any 1 of 3 places so this makes 26*3 = 78 possibilities.

For each of these there is any one of permutations of 2 digits from 10

= 10P2 = 10! / 8! = 10*9 = 90.

So the answer is 78 * 90 = 7020.

Note I am assuming that the 2 digits picked are different - no duplicates.

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