If John, Trey, and Miles want to know how’ |
many two-letter secret codes there are that dont

Anish Buchanan
2021-05-05
Answered

If John, Trey, and Miles want to know how’ |
many two-letter secret codes there are that dont

You can still ask an expert for help

timbalemX

Answered 2021-05-06
Author has **108** answers

Trey and Miles are correct — we can either use the reasoning “we do not
want for the two letters to be the same, so for the first letter we have 26
choices and for the second we have 25”, so we get 26-25, or we can find
the number of all two-letter codes, which we have 26-26, and subtract the
number of two-letter codes with a repeated letter, which we have 26.

Adding 26 and 25 makes no sense, since for each choice of the first letter we have 2% additional codes.

Adding 26 and 25 makes no sense, since for each choice of the first letter we have 2% additional codes.

asked 2021-09-08

A restaurant offers a $12 dinner special that has 7 choices for an appetizer, 12 choices for an entree, and 6 choices for a dessert. How many different meals are available when you select an appetizer, an entree,and a dessert?

asked 2021-09-09

In a fuel economy study, each of 3 race cars is tested using 5 different brands of gasoline at 7 test sites located in different regions of the country. If 2 drivers are used in the study, and test runs are made once under each distinct set of conditions, how many test runs are needed?

asked 2020-12-13

A radio station gives a pair of concert tickets to the six caller who knows the birthday of the performer. For each person who calls, the probability is 0.75 of knowing the performers

asked 2021-06-15

asked 2021-06-03

asked 2021-12-08

What does it mean:

p(x|y)?

p(x|y)?

asked 2021-09-10

A report revealed that the average number of months that an employee stays in a factory is 36 months. Assuming that the number of months of an employee tenure in the factory is normally distributed with a standard deviation of 6 months, find the probability that a certain employee will stay.
a. More than 30 months
b. Less than 24 months
c. Between 24 to 48 months