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juin [17]
4 years ago
9

In a small private school three students are randomly selected from 18 available students what is the probability that

Mathematics
1 answer:
Komok [63]4 years ago
3 0

1/ 816  

Step-by-step explanation:

Step 1 :

Given

Total number of students in the school = 18

Number of students randomly selected = 3

Step 2 :

Number of ways in which 3 students can be selected out of 18 students is

C(18,3)  = 18! /(3!(*18-3)!) =  18*17*16/3*2*1 = 816

Number of ways in which 3 students are selected and they are the youngest  = 1

Hence the probability of selecting 3 youngest students from the available students is  1/ C(18,3) = 1/ 816  

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25 POINTS Please help me asap I will really appreciate it !
nydimaria [60]

3.  g(x) = (x+2)/ |x+2|  the denominator cannot be 0

   |x+2| cannot be 0  

x cannot equal -2

Domain all real numbers but -2

g(-1) = (-1+2)/ |-1+2| = 1/|1| = 1

4.  h(x) = (x-4)/(x^2+5x-36)

factor the denominator

h(x) = (x-4)/(x+9) (x-4)  the denominator cannot be zero  do not cancel, this is a hole

x+9 cannot equal zero so x cannot equal -9

x-4 cannot equal 0 so x cannot equal 4

Domain all real numbers but -9 and 4

h(-1) = (-1-4)/((-1)^2+5(-1)-36) = -5/(1-5-36) = -5/-40 = 1/8


5 0
3 years ago
3a+b=225, b-a=25 solve.
adelina 88 [10]
If you are solving by substituting A=50 and B=75
5 0
4 years ago
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Find the value of x. Round the length to the nearest tenth.
kirza4 [7]

Answer: 7.2ft

I explanation

4 0
3 years ago
The total cost (in dollars) of producing x food processors is C(x) = 2500 + 50x -0.28.
Darya [45]

Answer:

The exact cost of producing the 21st food processor is $38.52.

The marginal cost to approximate the cost of producing the 21st food processor is $38.24

Step-by-step explanation:

Consider the provided function.

C(x) = 2500 + 50x -0.28x^2

(A) Find the exact cost of producing the 21st food processor

The exact cost producing 21st food processor is C(21)-C(20)

Substitute x=21 in above function.

C(x) = 2500 + 50(21) -0.28(21)^2

C(x) = 2500 +1050 -123.48

C(x) = 3426.52

Substitute x=20 in above function.

C(x) = 2500 + 50(20) -0.28(20)^2

C(x) = 2500 +1000-112

C(x) = 3388

The exact cost producing is:

C(21)-C(20)=3426.52-3388=38.52

Hence, the exact cost of producing the 21st food processor is $38.52.

Part (B) Use the marginal cost to approximate the cost of producing the 21st food processor,

To find the marginal cost first differentiate the function with respect to x.

C(x) = 2500 + 50x -0.28x^2

C'(x) =50-0.56x

Now substitute x=21 in above function.

C'(x) =50-0.56(21)

C'(x) =50-11.76

C'(x) =38.24

The marginal cost to approximate the cost of producing the 21st food processor is $38.24

5 0
3 years ago
10*5+8= what I know the answer but people need points
valentina_108 [34]

Answer:

58

Step-by-step explanation:

lol

use pemdas

50 + 8

58

3 0
4 years ago
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