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

    6 During the winter, the probability that Barry’s cat, Sylvester, chooses to stay outside all night
    is 0.35 , and the cat’s choice is independent from night to night.
    (a) Determine the probability that, during a period of 2 weeks (14 nights) in winter,
    Sylvester chooses to stay outside on at most 7 nights

    Well, if the cat has a 35% chance of staying out one night, the probability of it staying out for 2 nights is 17.5%. It would split in half. It staying out 7/14 nights is basically the same principle. (35/14)*7 is how you would work it out or 35/2. But yeah, haven't done Math in a while. Could be wrong.
    • Study Helper

    Study Helper
    Think binomial.
Submit reply
Turn on thread page Beta
Updated: March 20, 2011
Do I go to The Streets tomorrow night?
Useful resources

Make your revision easier


Maths Forum posting guidelines

Not sure where to post? Read the updated guidelines here


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