Questions
Let E be an event which is neither a certainty nor an impossibility. If probability is such that and in terms of an unknown . Then P(E) is equal to
detailed solution
Correct option is B
P(E)+PE'=1∴ 1+λ+λ2+(1+λ)2=1⇒ 2λ2+3λ+1=0⇒ (2λ+1)(λ+1)=0⇒ λ=−1,−12For λ=−1,P(E)=1+(−1)+(−1)2=1 (not possible)For λ=−12,P(E)=1+−12+−122=12+14=34Talk to our academic expert!
Similar Questions
A bag contains 10 different balls. Five balls are drawn simultaneously and then replaced and then seven balls are drawn. If the probability that exactly three balls are common to the two draws is p, then the value of 8p is ________.
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
free study material
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests
