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fredd [130]
3 years ago
11

I have two coins. One is fair, and has a probability of coming up heads of.5. \text {The second is bent, and has a probability o

f coming up heads of} .75The second is bent, and has a probability of coming up heads of.75. If I toss each coin once, what is the probability that at least one of the coins will come up tails?
Mathematics
1 answer:
aniked [119]3 years ago
6 0

Answer:0.625

Step-by-step explanation:

Given

There are two coins one is fair and another is bent

Probability of getting a head on fair coin is 0.5

Probability of getting a head on bent coin is 0.75

If both coins are tossed once

probability of getting at least one of the coin will come up tails is

P=1-P(both\ heads)

P=1-0.5\times 0.75

P=1-0.375

P=0.625

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patriot [66]

Answer: 0.0775

Step-by-step explanation:

Given : Mean : \mu = 25

Standard deviation : \sigma =15

Sample size : n=36

Since its normal distribution , then the formula to calculate the z-score is given by :-

z=\dfrac{x-\mu}{\dfrac{\sigma}{\sqrt{n}}}

For x= 28.2 hours

z=\dfrac{28.2-25}{\dfrac{15}{\sqrt{36}}}=1.28

For x= 30 hours

z=\dfrac{30-25}{\dfrac{15}{\sqrt{36}}}=2

The P- value = P(1.28

=P(z

Hence, the probabiliy that the average time spent stydying for the sampe was between 28.2 and 30 hours = 0.0775

6 0
3 years ago
The volume of this storage container is 1,400 cubic inches. The length is 20 inches and the width is 14 inches.
Vitek1552 [10]

Answer:

<h2>A) Height is the missing measurment.</h2><h2 /><h2> B)  1,400= 20 × 14 × H</h2><h2 /><h2>C) 1400 ÷ H = 280</h2>

Step-by-step explanation:

A) Length × Width × Height

B) V is 1,400

    L is 20

    W is 14

    H is unknown so use a variable

C) 20 × 14= 280.

8 0
3 years ago
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If a woman takes an early pregnancy test, she will either test positive, meaning that the test says she is pregnant, or test neg
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Answer:

0.0098

Step-by-step explanation:

Probability of being pregnant:100/1000

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98% chance:=98/100 ×1/10

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Therefore the probability that she really is pregnant is: 0.098

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Korolek [52]
We are tasked to solve the three angles given that we have the measurements of the sides such as
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b = Rachel to Maddie distance
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b =2.5
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Solving the angles we need to use Law of Cosines:
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The three angles are 48.59°,38.63° and 92.79°. 
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