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MA_775_DIABLO [31]
3 years ago
9

Suppose a bus arrives at a bus stop every 35 minutes. If you arrive at a bus stop at a random time, what is the probability that

you will have to wait at least 20 minutes for the bus?
A- 3/7
B- 1/2
C- 5/7
D- 3/4
Mathematics
2 answers:
Alchen [17]3 years ago
8 0

Answer:

\frac{3}{7}  

Step-by-step explanation:

Given : Suppose a bus arrives at a bus stop every 35 minutes

To Find: If you arrive at a bus stop at a random time, what is the probability that you will have to wait at least 20 minutes for the bus?

Solution:

A bus arrives at a bus stop every 35 minutes.

You arrive at a bus stop at a random time.

So, probability that you will wait at most 20 minutes = \frac{20}{35}

So, The probability that you will wait at least 20 minutes = 1-\frac{20}{35}

                                                                                               = \frac{35-20}{35}  

                                                                                               = \frac{15}{35}  

                                                                                               = \frac{3}{7}  

Thus the probability that you will have to wait at least 20 minutes for the bus is  \frac{3}{7}  

Serjik [45]3 years ago
3 0
5/7 because the original ratio would be 20/35 and then it would reduce to 5/7

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