What is the total number of digits required in numbering the pages of a book, which has 1,724 pages?

Thanks :)

5789

Step-by-step explanation:

There are 9 numbers with 1 digit (1-9).

There are 90 numbers with 2 digits (10-99).

There are 900 numbers with 3 digits (100-999).

There are 725 numbers with 4 digits (1000-1724).

So the total number of digits is:

(9)(1) + (90)(2) + (900)(3) + (725)(4) = 5789

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.

it would not be increasing by nothing that i can see probably by 25 percent that is all i can sat\y for now if i have any thing else to say i will edit this.

step-by-step explanation: