The first digit of a randomly chosen expense account claim f

The first digit of a randomly chosen expense account claim follows Benford\'s law (see this example.). Consider the following events.

A = {first digit is 4 or greater}
B = {first digit is even}

(a) What outcomes make up the event A? (Enter your answers as a comma-separated list.)

__________

What is P(A)? (Enter your answer to three decimal places.)
P(A) =  

(b) What outcomes make up the event B? (Enter your answers as a comma-separated list.)

____________


What is P(B)? (Enter your answer to three decimal places.)
P(B) =  

(c) What outcomes make up the event \"A or B\"? (Enter your answers as a comma-separated list.)

____________


What is P(A or B)? (Enter your answer to three decimal places.)
P(A or B) =  

Solution