By investing in a particular stock, a person can make a profit in one year of $4000 with probability 0.3 or take a loss of $1000 with probability 0.7. What is this person’s expected gain?

Expected gain of person is $500.

Explanation:

Amount of profit to make=$4000

Probability of making $4000 profit=0.3

Amount of loss=$1000

Probability of loss=0.7

To Find:

What is this person’s expected gain?

Solution::

Let say Z denotes the gain then Z has two values +4000 and -1000.

(+ve sign for gain and -ve for loss)

By using the formula for expected value of discrete random variable.

where:

f(z) is the probability.

E(Z)=4000(0.3)+(-1000*0.7)

E(Z)=$500

Expected gain of person is $500.

the answer is: trichonympha lives in the gut of termites and digests cellulose eaten by the termite.

this is an example of a symbiotic association of a protozoan with its mode of association.

hope i

-lavira: )

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.