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# Question watch

1. Recently we have had our mocks for our GCSE maths exams.
Since we still have some time to go until the actual exams we have not covered all of the topics that were included in the PPE's in class.

Could someone please identify the topic pertaining to this question and also if possible the answer with steps, thanks in advance.

Question: S is the event 'picking a red counter' and P(S) = 2/9
Write down the value of P(S')
2. (Original post by Abu Bakr al Bag)
Recently we have had our mocks for our GCSE maths exams.
Since we still have some time to go until the actual exams we have not covered all of the topics that were included in the PPE's in class.

Could someone please identify the topic pertaining to this question and also if possible the answer with steps, thanks in advance.

Question: S is the event 'picking a red counter' and P(S) = 2/9
Write down the value of P( S' )
Thread moved to Maths. Please post in the Maths Forum if you have maths questions.

This topic is probability. P(S) means "The probability of event S occurring". So here P(S) = 2/9 means "The probability of picking a red counter is 2/9".

S' means "not S" so P( S' ) is "the probability of not picking a red counter".

So if we translate all of this the question becomes this:

"The probability of picking a red counter is 2/9. What is the probability of not picking a red counter?"

Do you have any ideas for this?
3. Oh ok so this question is ridiculously easy it's just a case of understanding the question.
Thanks,
Abu Bakr

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