The diagram shows a door lock. А 1
B 2
C 3
The code is a letter followed by a number.

a) How many different codes are there altogether?

b) I know that the correct code begins with C.
I press C, then I guess the single digit number
What is the probability that I open the door?

Give your answer as a fraction

pls, answer question A and B thx!
I'll give you brainliest answer!!!

Can you simplify 4/7? 24 points will be awarded!

Astocks price gained 3% in april and 5% in may and then lost 4% in june and 1% in july during which month did the stocks price change the most

Atest of sobriety involves measuring the subject's motor skills. a sample of 31 randomly selected sober subjects take the test and produce a mean score of 64.4 with a standard deviation of 2. a claim is made that the true mean score for all sober subjects is equal to 65. for each part below, enter only a numeric value in the answer box. for example, do not type "z =" or "t =" before your answers. round each of your answers to 3 places after the decimal point. (a) calculate the value of the test statistic used in this test. test statistic's value = (b) use your calculator to find the p-value of this test. p-value = (c) use your calculator to find the critical value(s) used to test this claim at the 0.2 significance level. if there are two critical values, then list them both with a comma between them. critical value(s) =