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3 years ago

A number chosen at random 1 to 25 find the probability of selecting a greater number than 24

Mathematics

2 answers:

Zolol [24]3 years ago

6 0

1/25
the only greater number than 24 permitted is 25

stira [4]3 years ago

5 0

1/25 because the only number higher than 24 is 25 and you are choosing a number between 1 and 25

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A fair die is rolled nine times. What is the probability that

Lisa [10]

Answer:

The answer is 46/512 = 0.08984375

Step-by-step explanation:

In this question, success means to get an odd number on rolling a die.

The probability of success p = 3/6 = 1/2

So p = 1/2

Now lets find probability of failure q

q = 1 - p = 1 - 1/2 = 1/2

So q = 1/2

Let X = x denotes the number of success in n trials.

So X is a Binomial Random Variable

Which has the following parameters:

n = 9

as the fair die is rolled nine times and

p = 1/2

Now the Probability of x success out of n trials P( X = x) is:

P(X = x) = p(x) = nCx pˣ , qⁿ⁻ˣ , x= 0,1,2,...,9

P(X = x) = p(x) = nCx (1/2)⁹ = ₉Cₓ (1/2)⁹ = ₉Cₓ /512

Since the required probability is P (X < 3) So

P(X < 3) = P(X = 0) + P( X = 1) + P(X = 2)

= 1 / 512 {₉C₀ + ₉C₁ + ₉C₂} nCr = n! / r! * (n - r)!

= 1 / 512{ (9! / 0! * (9 - 0)!) + (9! / 1! * (9 - 1)!) + (9! / 2! * (9 - 2)!) }

= 1 / 512 { 1 + 9 + 36 }

= 46 / 512 = 0.08984375

So the required probability is 46/512

5 0

3 years ago

PLEASE HELP I"LL GIVE BRAINLIEST!!

zysi [14]

Answer:

the slopes of f(x)and g(x)are the same

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

The problem below has been solved incorrectly. Identify and explain the error.

mylen [45]

Answer:

If you look over the steps you can see that until 4x + x + 3 = 18, evertything is dandy. But the step after that 4x + x =21 seems a bit fishy.

Think about it they subtract 3 from both sides so the first side is correct

4x + x, but they added 3 to the other side:

$(4x+x+3) - 3 = 18 - 3\\4x+x = 15$

not

4x+x = 21

Then we solve for 4x + x = 15

$5x = 15\\x = \frac{15}{5} \\x = 3$

To solve for y we use :

y = x+3

y = 3+3 = 6

so (3,6) is the right answer

7 0

3 years ago

Please please please help!!!!

RUDIKE [14]

Answer:

only -3,5 is the answer.

6 0

3 years ago

Question 5

navik [9.2K]

Answer:

A. Similar using SAS; ∆ABC ~ ∆DFE

Step-by-step explanation:

m<B of ∆ABC = m<F of ∆DFE

AB corresponds to DF

AB/DF = 12/8 = 3/2

BC corresponds to FE

BC/FE = 24/16 = 3/2

Thus, the ratio of the corresponding sides of both triangles are the same. Therefore, both triangles has two sides that are proportional to each other, and also had an included corresponding angles that are congruent to each other.

By the SAS criterion, we can conclude that both triangles are similar to each other. That is, ∆ABC ~ ∆DFE

7 0

2 years ago