Question

(ANYONE good at probabilities?)The train station runs trains every 30 minutes. Find the probability that a passenger who arrives at a random time will not have to wait more than 20 minutes.
A.1/3
B.1/2
C.2/3
D.25/30

Answer 1

A or B. * oops.

Answer 2

hello??

Answer 3

i wanna say c...
*train arrives
1...>20mins
2...>20mins
3...>20mins
4...>20mins
5...>20mins
6...>20mins
7...>20mins
8...>20mins
9...>20mins
up until exactly 10 ...>20mins
11...<20mins
12...<20mins
13...<20mins
14...<20mins
15...<20mins
16...<20mins
17...<20mins
18...<20mins
19...<20mins
20...<20mins
21...<20mins
22...<20mins
23...<20mins
24...<20mins
25...<20mins
26...<20mins
27...<20mins
28...<20mins
29...<20mins
*train arrives

sum is 10/30 @...>20mins
20/30 @...<20mins

Answer 4

2/3

Answer 5

Thanks for typing all of that out. x)

Answer 6

yeah
P("will not have to wait more than 20 minutes") = 1- P(will have to wait more than 20 minutes) = 1 - 1/3
= 2/3

Answer 7

s ók

Answer 8

oooo shiny