An extra security passcode for a certain account is made up of 2 digits followed by 1 letter. the digits may be the same. hector chooses a passcode for this account. enter values to answer the questions below.

There is 10 digits to choose from and 26 letters.

Multiply the 3 choices together for total combinations: 10 x 10 x 26 = 2600.

The probability pf picking the first digit would be 1/10

The probability of picking the 2nd digit would also be 1/10

The probability of picking the letter would be 1/26

Step-by-step explanation:

Given: An extra security pass-code for a certain account is made up of 2 digits followed by 1 letter.

The number of choices for first and second place =10

The choices for the third place  26

If repetition is allowed then  the number of ways of making a pass code is given by :-

The probability of choosing the first digit correctly =

Similarly , the probability of choosing the second digit correctly =

The probability of guessing letter correctly =

If we choose the digits and letters randomly , then the probability that you would guess Hector's passcode correctly on the first tr4=y is given by ;-

i believe

step-by-step explanation:

from my conclusion c

step-by-step explanation:

the original amount doesn't ''re just looking for the time it takes for 1/2 of the substance to we have

(1/2) =)     take the ln   of both sides

ln (1/2)   = )   and we can write

ln(1/2) = ) lne     and lne   = 1     so we have

ln(1/2) = -.1092t     divide both sides by -.1092

t = ln(1/2)/-.1092 = about 6.347 days = about 6.3 days (rounded)