An urn contains different colored marbles. the probability of drawing two green marbles from the urn without replacement is 3/20 , and the probability of drawing one green marble is 2/5 .
what is the probability of drawing a second green marble, given that the first marble is green?
3/50
1/2
3/8
1/5

The probability of drawing a second green marble, given that the first marble is green is:

Let A denote the event that first marble is green.

B denote the event that the second marble is green.

A∩B denote the event that both the marbles are green.

Let P denote the probability of an event.

We are asked to find:

                      P(B|A) i.e. probability of drawing a second green marble, given that the first marble is green.

We know that:

Probability of drawing one green marble is 2/5  i.e.

The probability of drawing two green marbles from the urn without replacement is 3/20 i.e.

Hence, we have:

the population of other specie of birds will decline or other specie of birds will find some alternate source of food to survive.

explanation:

according to the competitive exclusion principle, which is also known as gause's law, two specie living in the same niche and feeding on the same resource cannot co-exist stably.

as we have well studied the theory of natural selection which states that only those organisms survive which have better tendency to compete for food and adapt to the environmental conditions.

coming towards the question, what wi ll happen when one species outcompetes the other for the small fish , the other specie will not get enough food and will start to die or decline in population. eventually either other specie needs to find another alternative food source for itself or migrate at some other location where there is less competition otherwise it will just not exist anymore at that niche.

hope it !