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kvasek [131]
2 years ago
14

Johnny did a survey and discovered that 5 out of 32 students walk to school. if 3 students are randomly selected from johnny's s

chool, without replacement, what is the probability that all 3 students walk to school?
Mathematics
2 answers:
Margarita [4]2 years ago
8 0

The answer is 0.38%.

Murljashka [212]2 years ago
4 0
The probability that all three students walk to school is given by (5/32)^3 = (0.15625)^3 = 0.003815
Therefore, the probability that all 3 students walk to school is 0.003815 = 0.38%
You might be interested in
Find the range of allowable values based on a measure of 130 inches if the values can vary by 1.4%.
olganol [36]

Answer:

130 ± 1.82 inches i.e the range of the values is 128.18 inches to 131.82 inches.

Step-by-step explanation:

The range of values required here implies the values fall between the least and maximum values.

Since the values can vary by 1.4%, the range can be determined by:

1.4% of 130 = \frac{1.4}{100} x 130

                  = 0.014 x 130

                  = 1.82

The addition or subtraction of 1.82 to/from 130 inches gives the required range.

i.e the range of allowable values = 130 ± 1.82 inches.

Thus,

130 - 1.82 = 128.18 inches

130 + 1.82 = 131.82 inches

The values falls between 128.18 inches to 131.82 inches.

6 0
2 years ago
There are 9 red and 6 green marbles in a bag. a child reaches in the bag and randomly takes one marble. what is the probability
german
Probability of green= # of green marbles ÷ total # of marbles
                               
                              =  6 ÷ (6 + 9)
                             
                              = 0.4  OR  \frac{2}{5} 
8 0
2 years ago
Barbara is tiling her craft room floor with square tiles. She wants 6/10 of squares tiles to be red. If she uses 18 red tiles, h
Sveta_85 [38]

Answer:

6 and 18 are common because 6x3=18. Remember the rule to multiply all numbers by 3. So multiply 10 by 3 and you will get 30. The total number of square tiles needed is 30 tiles. If you are putting it into a ratio it would be 18:30.

5 0
2 years ago
On Monday, the ABC Company stock was at $12.80 per share. On Tuesday it gained $3.42, and then lost $9.70 on Wednesday. What is
solong [7]

Answer:

Step-by-step explanation:

12.80+3.42= 16.22

16.22-9.70= 6.52 that's your answer

6 0
2 years ago
The function p(x) = _2(x _ 9)2 + 100 is used to determine the profit on T-shirts sold for x dollars. What would the profit from
Valentin [98]

Answer:

Option (b) is correct.

The profit  from sales if the price of the T-shirts were $15 a pieces is $28.

Step-by-step explanation:

Given : The function p(x)=-2(x-9)^2+100 is used to determine the profit on T-shirts sold for x dollars.

We have to find the profit from sales if the price of the T-shirts were $15 a pieces.

Consider the given profit function  p(x)=-2(x-9)^2+100

For the profit, if the price of a t-shirt is $ 15

Put x = 15, we have,

p(15)=-2(15-9)^2+100

Simplify, we have,

p(15)=-2(6)^2+100=-2\cdot 36+100

Also,  p(15)=-72+100=28

Thus, we get,  The profit  from sales if the price of the T-shirts were $15 a pieces is $28.

5 0
2 years ago
Read 2 more answers
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