IB Mathematics Applications and Interpretation Quiz
7 questions · no time limit
0:00
Finish quiz
STATISTICS AND PROBABILITY
Question 1
of 7
Flag for review
No time limit
Current
Answered
Flagged
Not seen
PASSAGE
The time
T
T
T
, in minutes, a customer waits for a coffee is modelled by the probability density function
f
(
t
)
=
0.5
e
−
0.5
t
f(t) = 0.5e^{-0.5t}
f
(
t
)
=
0.5
e
−
0.5
t
for
t
≥
0
t \ge 0
t
≥
0
.
Given that a customer has already waited for 2 minutes, find the probability that they will wait for at least one more minute.
A
0.145
B
0.223
C
0.393
D
0.607
YOUR PROGRESS
7
QUESTIONS
Ready when you are
Answer in any order. Your progress shows here as you go.
QUESTIONS
1
2
3
4
5
6
7
KEYBOARD
Pick an answer
A
B
C
D
Next question
↵
→
Previous
←
Flag for review
F