Question

Stillwater Junior High divides students into teams taught by a group of teachers.

Answer 1

@rational

Answer 2

@iGreen @amistre64

Answer 3

Is it 78/400 +77/400? or no?...

Answer 4

this one is confusing me

Answer 5

u need help again? lol

Answer 6

why are you adding ?

Answer 7

yeah and ummm I'm not sure. I just thought that's what I would do, but I'm almost positive it's wrong. I don't know what to do.

Answer 8

let me ask you a quick question :
suppose you throw a coin 100 times, it landed on heads all 100 times.
whats the probability that you will get a tail on 101th time ?

Answer 9

I don't know..

Answer 10

give it a try, it is easy

Answer 11

1/2

Answer 12

thats correct! but why ?

Answer 13

because there are 2 total options and 1 of them is tails.

Answer 14

thats right but what about the 100 heads in the previous 100 throws ?

Answer 15

does it matter ?

Answer 16

it doesnt matter because the coin wont remember anything about the past
each throw is fresh and brand new

Answer 17

similarly here computer also wont remember what happened in the past

Answer 18

ohhh, okay.

Answer 19

the probability for the computer to draw a student from Blazers team on the second try will be same as the probability to draw a student from Blazers team on the first try.

Answer 20

but it asked the probability it will choose another student from the blazers...

Answer 21

So the answer is simply
\[\large \dfrac{ 80}{400}\]

Answer 22

I am interpreting "another student" as "student in second try"

Answer 23

really?

Answer 24

you could also interpret "another student" as "a student different from the first student"

but i guess il stick to my first interpretation itself

Answer 25

so 1/5?

Answer 26

okay.

Answer 27

that makes sense. thank you

Answer 28

that looks good