Answer:
area = 100.5 in²
Step-by-step explanation:
area = 13.4 x 7.5 = 100.5 in²
Answer:
How long will it take a plane to fly 310 miles at 124 miles per hour?
A.) 1.5h
B.) 2h
<u>C.) 2.5h
</u>
D.) 3h
Step-by-step explanation:
For the first one its (A) For the 2nd its (C) For the 3rd its (B)
Answer:
The total number of marbles in the bag is 50.
Step-by-step explanation:
Here, we have n trials, without replacement. So the hypergeometric distribution is used.
The mean of the hypergeometric distribution is:

In which n is the number of items in the sample, k is the number of items in the population that are classified a success and N is the size of the population.
15 marbles are drawn:
This means that 
A bag contains some number of marbles. It is known that 20 of them are red.
This means that
, since a success is drawing a red marble.
Assuming E(X)=6 red, what is the total number of marbles in the bag?
We have to find N when 
So





The total number of marbles in the bag is 50.