gcse probability - question b | Revision Server | Page 1

coral jay Oct 31, 2023, 7:10 PM

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help with question b pleasee

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pleasepleaseplease helpppppppp

coral jay Oct 31, 2023, 7:39 PM

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<@&791435371564892232>

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i forgot i can do that

hidden swift Oct 31, 2023, 7:57 PM

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i think u do (1/3)^24 for a

coral jay Oct 31, 2023, 7:57 PM

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i did a i got it right

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b is so confusing man idk

hidden swift Oct 31, 2023, 7:58 PM

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oh

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do you have the answer

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for b

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like a page with all the answers

coral jay Oct 31, 2023, 8:01 PM

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yeah

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its 25p

hidden swift Oct 31, 2023, 8:01 PM

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why am i baffed as well

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i do a level fm 😭

coral jay Oct 31, 2023, 8:02 PM

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im so lost

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😭

coral jay Oct 31, 2023, 8:02 PM

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hidden swift i do a level fm 😭

textbook questions are worded in the worst possible way

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ever

frail rivet Oct 31, 2023, 8:04 PM

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coral jay its 25p

I really really hate this but I think I got it

coral jay Oct 31, 2023, 8:04 PM

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omg

frail rivet Oct 31, 2023, 8:05 PM

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Okay so it cost the person 50p to play, so every time someone plays the fete gets 50p

coral jay Oct 31, 2023, 8:05 PM

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yes

frail rivet Oct 31, 2023, 8:06 PM

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The chance of a person winning is 3/12 = 1/4, and whenever someone wins they get £1

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So, on average, the fete has to pay £1/4 = 25p per go

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So their average profit would be what they get minus what they have to pay on average

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so 50p - 25p = 25p

coral jay Oct 31, 2023, 8:07 PM

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but

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how did u find out they have to pay £1/4

frail rivet Oct 31, 2023, 8:07 PM

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As someone who also does further maths that's a fucking stupid question

coral jay Oct 31, 2023, 8:07 PM

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im so confused

coral jay Oct 31, 2023, 8:07 PM

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frail rivet As someone who also does further maths that's a fucking stupid question

ive spent half an hour going back to it and trying to figure it out

hidden swift Oct 31, 2023, 8:07 PM

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i think ive got it

frail rivet Oct 31, 2023, 8:08 PM

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coral jay how did u find out they have to pay £1/4

Because if someone wins the fete has to pay them £1, and as the probability of someone winning is 1/4 the fete on average has to pay 1/4 * £1

hidden swift Oct 31, 2023, 8:08 PM

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for every 4 games you win once theoretically,
so she pays 4 x 50p = £2
and wins £1 so
£2-£1 = £1
so you win £1 on average every 4 games

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so £1 / 4 = 25p

frail rivet Oct 31, 2023, 8:08 PM

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I mean that's another way of doing it

coral jay Oct 31, 2023, 8:09 PM

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oh

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okay

hidden swift Oct 31, 2023, 8:09 PM

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does that make sense

coral jay Oct 31, 2023, 8:09 PM

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wait let me take in the info first

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i have to process it 😔

coral jay Oct 31, 2023, 8:10 PM

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hidden swift does that make sense

yes

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kind of

hidden swift Oct 31, 2023, 8:10 PM

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imagine it happening irl

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thats what i did lol

coral jay Oct 31, 2023, 8:10 PM

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frail rivet Because if someone wins the fete has to pay them £1, and as the probability of ...

yeahhhhh

coral jay Oct 31, 2023, 8:10 PM

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hidden swift imagine it happening irl

i think i get it

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probs wont appear on the test

hidden swift Oct 31, 2023, 8:10 PM

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some scammy game

coral jay Oct 31, 2023, 8:10 PM

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if it does haha

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word

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😭

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thx guysssssss

#gcse probability - question b