Answer:
A. 27
Step-by-step explanation:
There are 40 students and 90% of them take exams
       (40 students) * (0.9) = 36 students took exams
Of those 36 students, 75% (or 3/4) of them passed. Assuming passing exams means graduating:
       (36 students) * (0.75 ) = 27 students graduated
 
        
             
        
        
        
Let's start by calculating how many students does 24% represent.
24% * 24 = 0.24 * 24 = 5.76
We got a decimal number as solution. The reason why exactly 24% students can't be in the play is because this percentage does not represent whole number of students. She can't take 0.76 students
If she wanted 25% students to be in a play it would mean she has to take:
25% * 24 = 0.25 *24 = 6 students
        
             
        
        
        
Answer:
<h2>25,75</h2>
Step-by-step explanation:
(35 + 40 + 12 + 16) : 4
= (75 + 28) : 4
= 103 : 4
= 25,75
 
        
             
        
        
        
As the pen is a triangle, the third side can either be the hypotenuse or a regular side. If the third side is the hypotenuse, it's length would be 

 feet. If the third side is a regular side, than it would be 

≈12.689 feet. This means your third side can either be 17 feet long or 12.689 feet long.
 
        
        
        
Answer:
0.7061 = 70.61% probability she will have her first crash within the first 30 races she runs this season
Step-by-step explanation:
For each race, there are only two possible outcomes. Either the person has a crash, or the person does not. The probability of having a crash during a race is independent of whether there was a crash in any other race. This means that the binomial probability distribution is used to solve this question.
Binomial probability distribution
The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

In which  is the number of different combinations of x objects from a set of n elements, given by the following formula.
 is the number of different combinations of x objects from a set of n elements, given by the following formula.

And p is the probability of X happening.
A certain performer has an independent .04 probability of a crash in each race.
This means that 
a) What is the probability she will have her first crash within the first 30 races she runs this season
This is:

When 
We have that:



0.7061 = 70.61% probability she will have her first crash within the first 30 races she runs this season