Jake is going to call one person from his contacts at random. He has 303030 total contacts. 161616 of those contacts are people he met at school.
What is \text{P(call a person from school})P(call a person from school)start text, P, left parenthesis, c, a, l, l, space, a, space, p, e, r, s, o, n, space, f, r, o, m, space, s, c, h, o, o, l, end text, right parenthesis?
If necessary, round your answer to 222 decimal places.

0.53

Step-by-step explanation:

I think the question is:

Jake is going to call one person from his contacts at random. He has 30 total contacts. 16 of those contacts are people he met at school.

What is call a person from school?

If necessary, round your answer to 2 decimal places.

The probability of choosing a contact from school is 16/30, which is equivalent to 8/15. That is about 0.53333, with a repeating decimal. So, if you round that to 2 decimal places, it is 0.53.

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.