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4 years ago

PLEASE HELP ME ILL GIVE 20 POINTS

Mathematics

1 answer:

aalyn [17]4 years ago

7 0

Answer:

I'm pretty sure the real answer is supposed to be 8, but since that isn't an option, it would probably be C. 7ft/yr

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Find the probability of rolling a sum of 3.

yarga [219]

Answer:

robability formula is the ratio of number of favorable outcomes to the total number of possible outcomes. Measures the likelihood of an event in the following way: - If P(A) > P(B) then event A is more likely to occur than event B. - If P(A) = P(B) then events A and B are equally likely to occur.

Step-by-step explanation:

6 0

4 years ago

Determine whether the set is finite ir infinite

STatiana [176]

Answer:

The set is Infinite

Step-by-step explanation:

Infinite sets are ≥ greater than 1 and sometimes has an N

5 0

2 years ago

Estimate the number of DVDs that will be checked out for every 100 patrons.

anastassius [24]

The number of DVDs that will be checked out for every 100 patrons will be 20.

<h3>How to find that a given condition can be modeled by binomial distribution?</h3>

Binomial distributions consist of n independent Bernoulli trials.

Bernoulli trials are those trials that end up randomly either on success (with probability p) or on failures( with probability 1- p = q (say))

Suppose we have random variable X pertaining to a binomial distribution with parameters n and p, then it is written as

$X \sim B(n,p)$

The probability that out of n trials, there'd be x successes is given by

$P(X =x) = \: ^nC_xp^x(1-p)^{n-x}$

The expected value of X will be:

$E(X) = np\\$

The information is given in the table.

The probability of getting DVDs will be

$\rm p = \dfrac{2}{10}\\\\p=2$

The value of n is 100.

Then the number of DVDs that will be checked out for every 100 patrons will be

$\rm E(X) = 100 \times 0.2\\\\E(X) = 20$

Learn more about binomial distribution here:

brainly.com/question/13609688

#SPJ1

5 0

2 years ago

Keith's height and his nephews height was at a ratio of 15:7 then, keith's Height increased by 16% and his nephews height double

Vikentia [17]

Answer:

311.6 cm

Step-by-step explanation:

To solve this problem, let's call:

k = Keith's height

n = nephew's height

Since the ratio is 15:7, we have

$\frac{k}{n}=\frac{15}{7}\\k=\frac{15}{7}n$ (1)

Then, Keith's height is increased by 16%, so the new height of Keith is

$k'=k+0.16 = 1.16k$ (2)

While the nephew's height is doubled:

$n'=2n$ (3)

We also know that Keith is now 34 cm taller than his nephew, so

$k'=n'+34$ (4)

Substituting (2) and (3) into (4), we get

$1.16k=2n+34$

And substituting (1),

$1.16\cdot \frac{15}{7}n=2n+34$

Solving for n,

$2.49n=2n+34\\\\0.49n=34\\n=\frac{34}{0.49}=69.4$

So the current height of the nephew is:

$n'=2n=2(69.4)=138.8 cm$

While Keith's current height is

$k'=138.8+34=172.8 cm$

So their total current height is

$k'+n'=172.8+138.8=311.6 cm$

8 0

4 years ago

PLEASE HELP! A basket contains four apples and five peaches. Three times, you randomly select a piece of fruit, return it to the

Lana71 [14]

Answer:

100 / 729

Explanation:

The general formula to calculate the probability of each event is:

Probability = number of positive (desired) outcomes / number of total outcomes

Number of apples = 4

Number of peaches = 5

Number of fruits = 9

Since the three times you return the radomly selected fruit, and then mix it, the three times the probability is not affected by the previous selection; so, these are independent events, and you can calculate the probability of the joint event as the product of the probabilities of each individual event.

First time:

Probability of getting an apple = number of apples / number of fruits = 4 / 9

Second time:

Probability of getting a peach = number of peaches / number of fruits = 5 / 9

Third time:

Probability of getting a peach = number of peaches / number of fruits = 5 /9

Joint probability:

= (4/9) × (5/9) × (5/9) = (4 × 5 × 5) / (9 × 9 × 9) = 100 / 729

5 0

3 years ago