Question

1: A and B can solve 60% and 80% of the problem in a book respectively. What is

probability that either A or B can solve a problem chosen a random.​

Answer 1

Step-by-step explanation:

Let E and F be the events defined as follows :

E=A solves the problem

F=B solves the problem

Clearly, E and F are independent events such that

P [E] = 60/100 = 6/10

And pf = 80/100 = 8/10

Now required probability

P ( E U F )

1 - p (E) p (f)

1 - (1 - 6/ 10)(1 - 8/ 10) = 1 - 1/10x3/10