Question

can U help me plz and fast?

Calculate the theoretical probability for spinning black. Calculate the theoretical probability for spining red. P (black) and P (red)

Answer 1

From these figures you can calculate the experimental probability. The best estimate comes with the most spins.

Answer 2

the first step is it: P(black) 20/10?

Answer 3

ok

Answer 4

No first one is 20 / total spins = 20/30

Answer 5

ok

Answer 6

then I need to answer 20 /30?

Answer 7

welshfella, what do I need to do next?

Answer 8

the closest value to the theorretical probability will be from Olga's 300 spins
P(Black) = 174/300 and P(red) = 126/300

as a decimal these are 0.58 and 0.42

Answer 9

So wait what are we doing with our 20/30?

Answer 10

If its a fair spinner with equal areas for black and white the theoretical probability is 0.50 for black and red.

Answer 11

Just state the 3 results and write that Olga's result is closer to the theoretical probability because of the large number of spins involved.

Answer 12

No I can't because I need to show my work :) how I did it :)

Answer 13

So, 20/30

Answer 14

@welshfella
I answered a very similar question from a fairly rude poster about an hour ago - he seemed to have a couple of similar accounts, and used similar phrases and table layout.

Please make sure you are not being led astray here

Answer 15

Then we need to simplify right?

Answer 16

for first one P = 2/3 and 1/3 as i've said
second P = 38/60 and 22/ 60

and for Olga's work i've mentioned that already

Answer 17

OK thanks @MrNood

Answer 18

It doesn't make sence with the 38, how come there is a 38?

Answer 19

It shouldn't be Liam first? or something like that?

Answer 20

Maria spins 38 Black's from 60 spins
here P(black) = 38 / total spins = 38 / 60

Answer 21

And Liam?

Answer 22

check my posts - ive shown you how to work out liams and olga;s.

Answer 23

We need to simplify right the 20/30?

Answer 24

ok

Answer 25

So I have P(black) = 20/30

Answer 26

Probability of an event = No.of favorable outcomes/total number of possible outcome

Answer 27

Ok, that I understand I think, but the thing about 20/30 we need to simplify it right?

Answer 28

Yes,that 2/3

Answer 29

Ok, now I need to do 2/3 = 0.66666 but It will be 0.6 right?

Answer 30

No.In probability we keep the fractions.

Answer 31

Ok, but if we don't it would be o.6 still?

Answer 32

Then the P(Red) = 10/30?

Answer 33

Thats 1/3

Answer 34

Ok, thank you :)

Answer 35

Is that all?

Answer 36

2/3 and 1/3 for liam.
we still have 2 more people.

Answer 37

No it's alright it's these too that I needed the most :)

Answer 38

do you want a medal?

Answer 39

Yes.

Answer 40

thank you, you save my life;)

Answer 41

:)