Strach2k
Badges: 9
Rep:
?
#1
Report Thread starter 4 weeks ago
#1
https://ibb.co/HCPrcJY am I right in thinking the only way she can win both is 0. 4 + 0.3 so 0.7 is the answer? Or am I completely off track?
0
reply
dextrous63
Badges: 13
Rep:
?
#2
Report 4 weeks ago
#2
Multiply them, not add them.
1
reply
NotNotBatman
Badges: 20
Rep:
?
#3
Report 4 weeks ago
#3
The events are independent, so to find the intersection, multiply instead of adding.

If A and B are independent events
 P(A \cap B) = P(A) \times P(B)

I'm not sure if you understand that terminology, so in other words "multiply through tree diagrams when events are independent".

A quick way to remember is for "and" you multiply and for "or" you add. So wendy wins hoopla AND wendy wins coconut shy; winning one game is independent of the winning the other so multiply.
0
reply
Strach2k
Badges: 9
Rep:
?
#4
Report Thread starter 4 weeks ago
#4
Yeah soon as I posted I realise I must multiply them, thankyou
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

University open days

  • University of East Anglia
    PGCE Open day Postgraduate
    Sat, 29 Feb '20
  • Edinburgh Napier University
    Postgraduate Drop-in Brunch Postgraduate
    Sat, 29 Feb '20
  • Teesside University
    All faculties open Undergraduate
    Sat, 29 Feb '20

Do you get study leave?

Yes- I like it (431)
58.64%
Yes- I don't like it (40)
5.44%
No- I want it (214)
29.12%
No- I don't want it (50)
6.8%

Watched Threads

View All