Question

If P (A) = 2, P (B) = ő where A, B and Care elementary
event of a random experiment, then P(C)=?​

Answer 1

Answer:

Probability that the contractor will get an electric contract, P(A)=  

5

2

​  

….(1)

Probability that the contractor will get a plumbing contract, P(B)=  

7

4

​  

….(2)

Probability of getting at least one contract is =  

3

2

​  

 

P(A∪B)=  

3

2

​  

 i.e.,P(A∪B)=P(A)+P(B)−P(A∩B)=  

3

2

​  

….(3)

P(A∩B)=P(A)+P(B)−P(A∪B)

∴P(A∩B)=  

5

2

​  

+  

7

4

​  

−  

3 /2=  105 /32