Answer:
(a)117000 (b)1/117000 (c)116999/117000
Step-by-step explanation:
(a)There are 26 letters, hence <u>26</u> options for the first character
There are <u>9</u> options for the second character, because, you can place 1,2,3,4,5,6,7,8,or 9.
For the third character you can have <u>10</u> options, since, you can 1 through 9 and 0.
The 4th one has <u>10</u> options too since the same terminology is used for the 3rd digit as the 4th one.
For the last digit, You have <u>5</u> options,0, 2, 4, 6, and 8.
Hence, the answer is 26*9*10*10*5 = <u>117000</u>
(b)There is only 1 correct code, so the chance of getting it right is <u>1/117000</u>.
(c)There are 117000-1 ways oh getting it wrong, so <u>116999/117000.</u>
