Probability questions, Mathematics

The probability that a person will get an electric contract is 2/5 and the contract that he will not get plumbing  contract is 4/7.If the probability of getting at least one contract is 2/3,what is the probability that he will get both?

A)  17/105     B) 17/106      C) 15/106     D) 18/106

 

Consider the following events: A=person gets an electric contract=person gets plumbing contract

We have,

P(A)=2/5,P(B)=4/7 and P(AUB)=2/3

Now (AUB)=P(A)+P(B)-P(A∩B)

=>2/3=2/5+(1-4/7)-P(A∩B)

=>P(A∩B)=2/3+3/7-2/3=17/105

 

 

Posted Date: 7/23/2012 3:24:13 AM | Location : United States







Related Discussions:- Probability questions, Assignment Help, Ask Question on Probability questions, Get Answer, Expert's Help, Probability questions Discussions

Write discussion on Probability questions
Your posts are moderated
Related Questions
solve for k such that the system 4x+ky=6 kx+y=-3

Problem: A person has 3 units of money available for investment in a business opportunity that matures in 1 year. The opportunity is risky in that the return is either double o

can u tell me a website for iit-jee questions?

In a recent survey of 700 people, 15% said that red was their favorite color. How many people said that red was their favorite color? Find out 15% of 700 through multiplying 70

WHAT IS PRECALC

Manuel is a cross-country runner for his school’s team. He jogged along the perimeter of a rectangular field at his school. The track is a rectangle that has a length that is 3 tim

I am really stuck on this topic and other topics its extremely difficult and I dont know what to do Im stressing out help me please.

project assignment of page no.19 question no.2

Vertical Tangent for Parametric Equations Vertical tangents will take place where the derivative is not defined and thus we'll get vertical tangents at values of t for that we

The width of a rectangle is 30.5% of its length l. Write a formula for the area and perimeter of the rectangle in terms of l only