There are n people on a friendship-matchmaking app. We assume that each pair of people will connect and become friends with probability 0.1, independently of other pairs. Required:
a. You are one of the n people on the app. Let X be the random variable denoting the number of friends you will make on the website. Find the PDF of X.
b. What is the expected number of friends you will make on the app?
c. What is the probability that you will make at least 2 friends on the app?
d. What is the expected number of friendships formed on the app, i. e. what is the expected number of pairs that will connect and become friends?

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

7/2

(decimal: 3.5)

welcome ; )

step-by-step explanation:

77

step-by-step explanation:

you est gay to much man grow some bollas also man kcuf off you little harry p u s s y. stupid