kiyubi
Badges: 9
Rep:
?
#1
Report Thread starter 7 years ago
#1
probability of A is 0.70 that john attends an event
probability of B is 0.55 that mary attend an event
probability of A and B is 0.45 is that john and mary attend the same event

what is the probability of
that either john or mary or both attend a particular event?
either john or mary but not both attend a particular social event?

thanks a lot its really urgent as i have a stats exam tommorow
0
reply
Hopstano
Badges: 2
Rep:
?
#2
Report 7 years ago
#2
I've got the exam too, basically you can do it using a tree diagram but since this isn't too complex you can just multiply them D:

So:
1) either john or mary or both attend a particular event?
0.7*0.55*0.45=?
2)
either john or mary but not both attend a particular social event?
0.7*0.55=?

I think they're right hope this helps
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Back
to top
Latest
My Feed

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.

Personalise

Do you think receiving Teacher Assessed Grades will impact your future?

I'm worried it will negatively impact me getting into university/college (221)
43.25%
I'm worried that I'm not academically prepared for the next stage in my educational journey (58)
11.35%
I'm worried it will impact my future career (39)
7.63%
I'm worried that my grades will be seen as 'lesser' because I didn't take exams (108)
21.14%
I don't think that receiving these grades will impact my future (57)
11.15%
I think that receiving these grades will affect me in another way (let us know in the discussion!) (28)
5.48%

Watched Threads

View All