Hey there! Sign in to join this conversationNew here? Join for free

Maths Probability S1 question? Watch

Announcements
    • Thread Starter
    Offline

    2
    ReputationRep:
    If someone could help me with this question and explain to me how you got it it would be a great help

    At a certain location renowned for road accidents there is a 0.6 chance of there being an accident on a wet day and a 0.2 chance of there being an accident on a dry day. Long term records show that there is a 30% chance of the location having a day which is classified as wet. By first drawing a tree diagram, determine: a) the probability that there will be an accident at the location next Monday.
    b) the probability that next Monday is a wet day if there is an accident at the location that day.


    Many thanks!
    Offline

    10
    ReputationRep:
    For a) you wan't to find the probability that there is an accident regardless of weather, by drawing a tree diagram you could find the probability that there isn't an accident and do 1- this number (or just use values from question).
    For b) use conditional probability, so P(Wet given accident), which can also be done using the tree diagram
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Will you be richer or poorer than your parents?
    Help with your A-levels

    All the essentials

    The adventure begins mug

    Student life: what to expect

    What it's really like going to uni

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Uni match

    Uni match

    Our tool will help you find the perfect course for you

    Study planner

    Create a study plan

    Get your head around what you need to do and when with the study planner tool.

    Study planner

    Resources by subject

    Everything from mind maps to class notes.

    Hands typing

    Degrees without fees

    Discover more about degree-level apprenticeships.

    A student doing homework

    Study tips from A* students

    Students who got top grades in their A-levels share their secrets

    Study help links and info

    Can you help? Study help unanswered threadsRules and posting guidelines

    Sponsored content:

    HEAR

    HEAR

    Find out how a Higher Education Achievement Report can help you prove your achievements.

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.