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Flashcards by Alice Kimpton, updated more than 1 year ago

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A Levels Maths (Stats 1) Flashcards on Probability S1, created by Alice Kimpton on 01/16/2016.

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Question | Answer |

What is the opposite/complement of A? What is the notation for this? | A' P(A')= 1 - P(A) |

Notation for probability of A and B occuring | P(A N B)= P(A) X P(B) AND MEANS MULTIPLY E.g. P(R W)= P(R) X P(W) |

Notation for either A or B occuring | P(A U B)= P(A) + P(B) OR STANDS FOR ADD |

What are mutually exclusive events? | two events that are mutually exclusive if the event of one happening excludes the other from happening. Basically they cannot happen at the same time. NOTATION P(A U B) |

What are non-mutually exclusive events? | the probability of A or B occurring is the probability of A add the probability of B minus probability that they both occur. NOTATION P(A U B)= P(A) + P(B) - P(A N B) This is, for example, because yo can have Ace of Spades or a Jack of Hearts |

What are inderpendent events? | two events are independent if they occurrence of one happening doesn't affect the occurrence of the other NOTATION P(A N B) |

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