Question

You are expecting a call from a friend anytime between 3:00 P.M. and 5:00 P.M. At 3:20 P.M, you discover that someone accidentally left the phone off the hook. What is the probability that you missed your friend’s call?

Answer 1

No. of minutes between 3 : 00 PM to 5 :00 PM = ?

Answer 2

i dont think so..

Answer 3

my answers are... about 10%

Answer 4

about 33%
about 17%
about 40%

Answer 5

P(given event) = \(\cfrac{\textbf{ No. of events in favor} }{ \textbf{Total events} }\)

So here : P(given event) = \(\cfrac{\textbf{20 minutes}}{\textbf{total minutes between 3:00 PM to 5:00 PM}}\)

Answer 6

See ... first of all total minutes between 3:00 PM to 5:00 PM would be 120 minutes, right?

Answer 7

honestly i coulnt tell you.. i suck at math...

Answer 8

See there are two hours between 3 PM and 5 PM ... and each hour contain 60 minutes.

So total minutes = 120 minutes (from 3 PM to 5 PM)

Answer 9

Now,

So we have : \(\cfrac{20}{120} \) = P(E)

\(\cfrac{1}{6} = P(E)\)

Now we will calculate the percentage... by multiplying it by 100%

Answer 10

That is \(\cfrac{1}{6} \times 100 \% = \cfrac{100}{6} \% = P(E)\)

You can calculate it now..

Answer 11

what is the P(E)

Answer 12

Probability of the given event.

Answer 13

about 33% it will be..

Answer 14

ok im tryin to work it out.. but im like lost.. how did you get that ?

Answer 15

Is it clear for you that it will be \(\cfrac{100}{6} \% \) ?

Answer 16

yea.. cause you would have to multiply it by 100.. right ?

Answer 17

Yes! Now calculate : 100/6

Sorry it will be about 17%

Answer 18

so since 20/120 is 1/6 you would divide 100/6 .. ..

Answer 19

.....

Answer 20

Yes ... as 1/6 was multiplied by 100 then..

100/6 = ?

Answer 21

16.67 which woul be 50/3

Answer 22

Yeah! you have it as about 17%

Answer 23

oooooooo ok i see

Answer 24

omg thank you..

Answer 25

You're welcome @ohnaw . Best of luck