Abuilding security code has 2 numeric digits 0 through 9 followed by 2 letters. what is the probability that the first digit is nine an last letter is a?

Step-by-step explanation:

Given : A building security code has 2 numeric digits 0 through 9 followed by 2 letters.

Total digits (0,1,2,3,4,5,6,7,8,9)= 10

Total letters in English Alphabet = 26

Then, the total number of ways to make a code if repetition is allowed :-

The number of ways to make a code with first digit is nine an last letter is A (we fix first position for 9 as 1 and the last position for a as 1) , if repetition is allowed :-

Then, the probability that the first digit is nine an last letter is A :-

Hence, the probability that the first digit is nine an last letter is A=

is should be y = 5x

step-by-step explanation:

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