Hey there! Sign in to join this conversationNew here? Join for free
x Turn on thread page Beta
    • Thread Starter
    Offline

    8
    ReputationRep:
    1.Jimmy runs a game to make money

    It costs £1 to play the game
    A player flips two fair coins. If a player gets two heads, they win £3.

    (a) How much profit does Jimmy expect to make if the game is played 100 times.


    (Second part)

    Lujain says that the game isn't very fair.

    Jimmy offers to change the game.
    He gives Lujain four coins to flip.
    If she gets three or four heads, then she will win £3

    (b) Does Lujain have more chance of winning the new game?

    Show how you decide



    I got £25 for the first part which I think is wrong.
    For the 2nd Part I tried to do a tree diagram but it was just to big to understand.... is there an alternative gcse way of using the tree diagram for probability??

    Thanks!
    • Very Important Poster
    • Study Helper
    Offline

    21
    Very Important Poster
    Study Helper
    Going to move this to the Maths forum as it's the best place for these questions
    Offline

    19
    ReputationRep:
    (Original post by queenfluffy23)
    1.Jimmy runs a game to make money

    It costs £1 to play the game
    A player flips two fair coins. If a player gets two heads, they win £3.

    (a) How much profit does Jimmy expect to make if the game is played 100 times.


    (Second part)

    Lujain says that the game isn't very fair.

    Jimmy offers to change the game.
    He gives Lujain four coins to flip.
    If she gets three or four heads, then she will win £3

    (b) Does Lujain have more chance of winning the new game?

    Show how you decide



    I got £25 for the first part which I think is wrong.
    For the 2nd Part I tried to do a tree diagram but it was just to big to understand.... is there an alternative gcse way of using the tree diagram for probability??

    Thanks!
    first part is correct


    no need for tree

    HHHH
    HHHT
    HHTH
    HTHH
    THHH
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: February 9, 2016
Poll
Do you agree with the proposed ban on plastic straws and cotton buds?
Useful resources

Make your revision easier

Maths

Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here

Equations

How to use LaTex

Writing equations the easy way

Student revising

Study habits of A* students

Top tips from students who have already aced their exams

Study Planner

Create your own Study Planner

Never miss a deadline again

Polling station sign

Thinking about a maths degree?

Chat with other maths applicants

Can you help? Study help unanswered threads

Groups associated with this forum:

View associated groups

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

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