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Mathematics 22 Online
OpenStudy (anonymous):

give an example of a compund event?

OpenStudy (jango_in_dtown):

HI... @geny55

OpenStudy (anonymous):

hi can you give me an example of a compound event?

OpenStudy (jango_in_dtown):

Yes... IN probablity?

OpenStudy (anonymous):

yes

OpenStudy (jango_in_dtown):

Let A denote the event of getting a mutiple of 3 when a die is thrown. Then it is a compound event since it consists of two events the first event is the event of getting 3 and the second event is the event of getting 6 when a die is thrown

OpenStudy (anonymous):

can you give me another example?

OpenStudy (jango_in_dtown):

Yes.

OpenStudy (anonymous):

give me an easier example please :)

OpenStudy (jango_in_dtown):

rolling a die and tossing a coin is a combination of 2 simple events and therefore a compound event.

OpenStudy (anonymous):

ok one more :)

OpenStudy (jango_in_dtown):

YOu want example different from rolling a die or tossing a coin?

OpenStudy (anonymous):

sure :)

OpenStudy (anonymous):

please huryy :)

OpenStudy (jango_in_dtown):

I am not getting any specific example. Sorry for that but the two examples I gave will also work

OpenStudy (anonymous):

ok can you help me with other questions please ? :)

OpenStudy (jango_in_dtown):

okk

OpenStudy (anonymous):

OpenStudy (jango_in_dtown):

First you calculate the area of the circle and the square and tell me

OpenStudy (anonymous):

um idk :(

OpenStudy (jango_in_dtown):

What?? what is the area of a square of side a units?

OpenStudy (anonymous):

9

OpenStudy (jango_in_dtown):

No//// |dw:1444763875421:dw|

OpenStudy (jango_in_dtown):

what is the area of the square in the picture?

OpenStudy (anonymous):

a

OpenStudy (jango_in_dtown):

its a^2

OpenStudy (anonymous):

ok

OpenStudy (jango_in_dtown):

No its not ok... You should learn first

OpenStudy (jango_in_dtown):

You just note down what I am saying

OpenStudy (anonymous):

okso the area for the square is 9^2

OpenStudy (jango_in_dtown):

correct

OpenStudy (jango_in_dtown):

and 9^2=81

OpenStudy (jango_in_dtown):

now you need to find the area of the circle

OpenStudy (anonymous):

3 ^2

OpenStudy (jango_in_dtown):

No its a circle , not a square.. Area of a circle =pi.r^2

OpenStudy (jango_in_dtown):

where r is the radius,,, Here the radius is 3/2=1.5

OpenStudy (jango_in_dtown):

so now find the area of the circle

OpenStudy (anonymous):

so 3^1.5

OpenStudy (jango_in_dtown):

no area=pi. (1.5)^2

OpenStudy (jango_in_dtown):

probability=area of circle/area of square=pi,(1.5)^2/3^2

OpenStudy (anonymous):

3.5 ( 1.5 ) ^2

OpenStudy (jango_in_dtown):

pi=3.14(correct upto 2 decimal places)

OpenStudy (anonymous):

oh ok so 3.14 (1.5) ^2

OpenStudy (jango_in_dtown):

so we need to calculate 3.14 (1.5)^2/9^2 which is nearly 0

OpenStudy (anonymous):

ok so the answerfor part A is?

OpenStudy (jango_in_dtown):

0

OpenStudy (jango_in_dtown):

closer to 0

OpenStudy (anonymous):

and why is it closer to 0?

OpenStudy (jango_in_dtown):

after calculation you will get 0

OpenStudy (jango_in_dtown):

area of circle/area of square

OpenStudy (anonymous):

whats the area of circle/area of square?

OpenStudy (jango_in_dtown):

probability of the black portion being hit= area of circle divided by the area of square

OpenStudy (anonymous):

@jango_IN_DTOWN

OpenStudy (anonymous):

and part b?

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