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Masja [62]
3 years ago
11

Twelve people are given two identical speakers, which they are asked to listen to for differences, if any. Suppose that these pe

ople answer simply by guessing. Find the probability that three people claim to have heard a difference between the two speakers.
Mathematics
1 answer:
Karolina [17]3 years ago
7 0

Answer:

Probability, P(X=3)=0.05371

Step-by-step explanation:

The experiment consists of 12 Bernoulli trials,n=12

Where sucess is defined with difference between the speakers and failure is defined with no difference between the speakers

Since people are guessing,the Probability P of sucess= 1/2

Therefore P(X=3) = b(3; 12, 0.5) = (12/3) (0.5)^3× (0.5)^9

P( X=3) = 0.0537

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rodikova [14]

Answer : 3, 360 ways

Total number of people running the race = 16

We have three slot to be filled for first, second and third

Any person can take the first position irrespective of the arrangement

one out of the 16 people can come first

out of the 15 people remaining , one person can also come second remaining 14

out of the 14 people, one person can also come third

The number of ways the gift can be awarded = 16 x 15 x 14

The nummber of ways the prizes can be awarded = 3360 ways

7 0
10 months ago
What is 5×3 3/4 please help me
Sveta_85 [38]
The first thing that's easiest for me, at least, is to make the mixed number into an improper fraction. That would make this problem 5 x 15/4. Just make five into a fraction, 5/1 and then put it into the problem:

5/1 x 15/4 = 75/4

Now, put the answer you got back into a mixed number (if your teacher wants you to)

How many times does four go into 75? 18, with a remainder of 3. The answer as a mixed number would be 18 3/4 or 18.75 

7 0
3 years ago
Point slope form <br> y-2=3/4(x+9)
makvit [3.9K]
<span>y-28/5 = 3/4 (x+21/5)!</span>
4 0
3 years ago
A certain coin is a circle with diameter 18mm. What is the exact area of either face of the coin in terms of
attashe74 [19]
Area=pir^2
d/2=r
given
d=18
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6 0
3 years ago
Parvati bought 8 gallons of paint tol a project. The KIMU UI panlil bie WuUym 13 pccu wym
lbvjy [14]

Answer:

(a) Brandon bought 5 gallons of paint for $90.

Step-by-step explanation:

Given

Parvati:

8\ gallon \to \$144

Required

Person with the same paint

First, calculate the unit cost of Parvati's paint

Unit = \frac{\$144}{8\ gallon}

Unit = \$18/gallon

To get the person with the same kind of paint, we simply calculate the unit price.

Whoever has the same unit price as Unit = \$18/gallon have the same kind of paint

Brandon

Amount = \$90

Size= 5\ gallons

So:

Unit = \frac{Amount}{Size}

Unit = \frac{\$90}{5\ gallons}

Unit = \$18/gallons

<em>Brandon has the same paint as Parvati because the unit prices are the same.</em>

3 0
3 years ago
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