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3 years ago

Can someone please help me with this question?

Mathematics

2 answers:

7nadin3 [17]3 years ago

7 0

D!!! That is the right one

madam [21]3 years ago

4 0

D. One reason, The others questions don't add up. Reason being, the perimeter of the garden is 4x+60, all of the other questions don't make up for that answer.
(I also can't read D, so I'm just assuming now.)

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In a game of checkers, there are 12 red game pieces and 12 black game pieces. Julio is setting up the board to begin playing. Wh

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Tatiana [17]

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3 years ago

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3 years ago

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find the probability of at least 6 failures in 7 trials of a binomial experiment in which the probability of success in any tria

prohojiy [21]

Answer:

0.8746 = 87.46% probability of at least 6 failures in 7 trials.

Step-by-step explanation:

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

7 trials

This means that $n = 7$

The probability of success in any trial is 9%?

So the probability of a failure is 100 - 9 = 91%, which means that $p = 0.91$

Probability of at least 6 failures in 7 trials?

This is:

$P(X \geq 6) = P(X = 6) + P(X = 7)$

In which

$P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}$

$P(X = 6) = C_{7,6}.(0.91)^{6}.(0.09)^{1} = 0.3578$

$P(X = 7) = C_{7,7}.(0.91)^{7}.(0.09)^{0} = 0.5168$

$P(X \geq 6) = P(X = 6) + P(X = 7) = 0.3578 + 0.5168 = 0.8746$

0.8746 = 87.46% probability of at least 6 failures in 7 trials.

4 0

3 years ago

Image is below, please help me fast i have 2 minutes left, thank you very much

Yuki888 [10]

Answer:

Step-by-step explanation:

1/3 of 90

= 1/3 * 90

= 90/3

= 30

Let the missing number be x.

2/3 of x

= 2/3 * x

= 2x/3

30 = 2x/3

Cross multiply,

2x = 30 * 3

2x = 90

x = 90/2

x = 45

Hence,

the missing number is 45.

5 0

2 years ago