logo

Ask Questions, Get Answers

 
X
 Search
Want to ask us a question? Click here
Browse Questions
Ad
Home  >>  CBSE XII  >>  Math  >>  Model Papers
0 votes

An experiment succeeds thrice as often as it fails. Find the probability that in the next five trials, there will be at least three successes

Can you answer this question?
 
 

1 Answer

0 votes

Assume that the total number of outcomes are 4 so 

P(success)=3/4=p and P(failure)=1/4=1-p=q

now wih binomial expansion the answer can be found 

P(X greater than or equal to 3)=5C3 p*3 q*2 + 5C4 p*4 q*1 + 5C5 p*5 q*0 
 
270/1024 + 405/1024 + 243/1024 = 918/1024 = 0.896
 

 

answered Feb 11 by _1
 

Related questions

Ask Question
student study plans
x
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App
...