Turn on thread page Beta
    • Thread Starter
    Offline

    12
    ReputationRep:
    In a competition, people pay $1 to throw a ball at a target. If they hit the target on the first throw they receive $5. If they hit it on the second or third throw they receive $3, and if they hit it on the fourth or fifth throw they receive $1. People stop throwing after the first hit, or after 5 throws if no hit is made. Mario has a constant probability of 1 5 of hitting the target on any throw, independently of the results of other throws.
    (i) Mario misses with his first and second throws and hits the target with his third throw.
    State how much profit he has made.
    (ii) Show that the probability that Mario’s profit is $0 is 0.184, correct to 3 significant figures.
    (iii) Draw up a probability distribution table for Mario’s profit
    (iv) Calculate his expected profit.
    • Thread Starter
    Offline

    12
    ReputationRep:
    Matureb
    Offline

    3
    ReputationRep:
    can somebody explain the answer to this question? thanks
    • Community Assistant
    • Study Helper
    Offline

    20
    ReputationRep:
    Community Assistant
    Study Helper
    (Original post by TiffaAly)
    can somebody explain the answer to this question? thanks
    Please start a new thread and show what you’ve tried.
    Offline

    3
    ReputationRep:
    (Original post by Notnek)
    Please start a new thread and show what you’ve tried.
    I have tried a multitude of threads, but alas, to no avail. will you aid me further o' wise one ?
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: March 5, 2018
Poll
Do you think parents should charge rent?
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.