Answer:
sqrt(41)
Step-by-step explanation:
Using pythagoras theorem
Repeated
the lowest first digit can be 2
hmm, 5 numbers
the smallest number is 211
1 cannot be used for the first number, leaving 4 choices for the first number
the last 2 numbers can be any of the 5 numbers so 5 choices each for each of those slots
so
4*5*5=100
there are 100 numbers
B is answer
Using the hypergeometric distribution, it is found that there is a 0.0452 = 4.52% probability that this group of four students includes at least two of the top three geography students in the class.
The students are chosen without replacement, hence the <em>hypergeometric distribution</em> is used to solve this question.
<h3>What is the hypergeometric distribution formula?</h3>
The <em>formula </em>is:
The parameters are:
- x is the number of successes.
- N is the size of the population.
- n is the size of the sample.
- k is the total number of desired outcomes.
In this problem:
- There are 28 students in class, hence .
- Four people will be chosen at random, hence .
- The top three is composed by 3 people, hence .
The probability that this group of four students includes at least two of the top three geography students in the class is:
In which:
Then:
0.0452 = 4.52% probability that this group of four students includes at least two of the top three geography students in the class.
You can learn more about the hypergeometric distribution at brainly.com/question/4818951
Answer:
the equation means that overall the distance is 200 miles per a hour the car has 2 speed it travels at. Sometimes it will travel at 35 miles per a hour and sometimes it will travel at 55 miles per a hour.
Step-by-step explanation:
ex.
55(3)+35y=200
165+35y=200
35y=35
she will spend 1 hour going at 35 mph