Got Homework?
Connect with other students for help. It's a free community.
Here's the question you clicked on:
 0 viewing
JULIAKAPRI
Group Title
help with this one plz
suppose there are three students and each student tosses a coin 10 times. so what is the chance that at least one of the students gets exactly 5 heads.
 one year ago
 one year ago
JULIAKAPRI Group Title
help with this one plz suppose there are three students and each student tosses a coin 10 times. so what is the chance that at least one of the students gets exactly 5 heads.
 one year ago
 one year ago

This Question is Closed

reemii Group TitleBest ResponseYou've already chosen the best response.2
\(P(\text{at least one .... happens}) = 1  P(\text{no such thing happens}).\) In general, this makes computations easier. You must compute \(1P(\text{none of the 3 students got exactly 5 heads})=1(P(A))^3\) where \(A=\{\text{one student does not get exactly 5} \}\). To compute P(A), use the same trick: P(A)=1P(it gets exactly 5 heads).
 one year ago

WalterDe Group TitleBest ResponseYou've already chosen the best response.0
@reemii please guide me how to calculate P(A)
 one year ago

reemii Group TitleBest ResponseYou've already chosen the best response.2
\(P(\text{a student doesn't obtain exactly 5 heads}) = 1  P(\text{a student obtains exactly 5 heads})\) (in 10 tosses) So we will compute : \(P(\text{5 heads in 10 tosses})\). A head appears with probability 0.5. Here you are in the situation of a binomial distribution. (\(X\sim\text{Bin}(10,0.5)\) and you want to know \(P(X=k)\)). Now it's just a formula.
 one year ago

reemii Group TitleBest ResponseYou've already chosen the best response.2
oops, first line is P(not 5 heads) = 1  P(exactly 5 heads).
 one year ago

WalterDe Group TitleBest ResponseYou've already chosen the best response.0
many thanks fot the explanation :)
 one year ago
See more questions >>>
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.