Intersection of 3 events

[jess5085]

Hi,
I'm stuck on this Q. I don't know how to calculate the intersection of all 3 events occurring. Based on the formula to find the probability of walk AND bus AND cycle I need to know the probability of walk OR bus OR cycle. Can I find this by P(walk) x P(bus) x P(cycle) i.e. 0.4 x 0.6 x 0.35 or is that not correct.

Thanks!.

 

[Dr.Peterson]

Hi,
I'm stuck on this Q. I don't know how to calculate the intersection of all 3 events occurring. Based on the formula to find the probability of walk AND bus AND cycle I need to know the probability of walk OR bus OR cycle. Can I find this by P(walk) x P(bus) x P(cycle) i.e. 0.4 x 0.6 x 0.35 or is that not correct.

Thanks!.

See the answers I just gave to the same question. This is not about independent events; it's a Venn diagram problem.

 

[jess5085]

Hi,

Sorry I didn't realize the previous thread was asking the same Q.

Is this the right equation to solve for x?



Thanks.

 

[Njords]

Hi,

Sorry I didn't realize the previous thread was asking the same Q.

Is this the right equation to solve for x?

View attachment 9908

Thanks.

Me thinks we are doing the same paper. lol

 

[jess5085]

Me thinks we are doing the same paper. lol

lol probably at least it makes sense now after reading ur thread

 

[Dr.Peterson]

Hi,

Sorry I didn't realize the previous thread was asking the same Q.

Is this the right equation to solve for x?

View attachment 9908

Thanks.

No. The 40% is not for just the region you put it in, but for that entire circle. The same is true of everything else.

Start with x in the middle; then put expressions in the three double-overlap regions based on what you know about those; and then fill in the three outer parts.