A code consists of eight letters chosen from the 26 letters of the alphabet. What is the chance that any two of the letters are the same?

1/26 or 0.039 (approximate to 3 decimal places)

Step-by-step explanation:

A code consists of 8 letters of the English alphabet (which comprises a total of 26 distinct letters). What is the chance or probability that any 2 letters of/in the code are the same?

An example of such code with a repeated letter is GREENMAN.

This word (code) has 2 letters that are the same and that's letter 'E'.

The probability that a letter in the code in question will appear twice depends on the frequency of appearance of that letter in the English alphabet set.

Now, no letter in the English alphabet set appears twice! Because of this, every letter in the English alphabet has an equal probability of being picked to form a code or word.

Hence, the chance that any letter from the alphabet will be repeated once in this code (same as saying the chance that any two letters of the code are the same) is 1/26 and that's equal to 0.03846 ≅ 0.039

distance covered by pamela in 9 l of fuel = 99km

let us apply unitary method here.

distance covered by pamela in 1 l of fuel =99/9 =11 km

now let us find distance covered by pamela if she has 12 l of fuel.

distance covered in 12 l = distance covered in 1 l of fuel * 12

we know that distance covered by here in 1 l is 11 km.

so distance covered in 12 l of fuel = 11*12 = 132 km.

f(x) is going down by 4

step-by-step explanation:

(its either that or its going left by 4)