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3 years ago

What is a proportion in math definition ???????????????

1 answer:

8 0

A proportion<span> is a name we give to a statement that two ratios are equal. It can be written in two ways: two equal fractions, or, using a colon, a:b = c:d.</span>

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Equivalent expressions for 12x+10-5x

Nutka1998 [239]

12x+10-5x

12x-5x+10 ( combine like terms)

12x-5x= 7x

Answer: 7x+10

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3 years ago

What is the value of the expression when a = -2, b = 3, and c = -6?

Artyom0805 [142]

<h2> Answer : –1</h2>

follow my account

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3 years ago

What expression is equivalent to two thirds?

ruslelena [56]

4/6, 12/15, 8/12 are some of the expressions

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3 years ago

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

10+ [(50 :5+6) x 3] - 4<br> e 34<br> o 50<br> 54<br> I don't know<br> Please help ASAP

torisob [31]

Answer:

The third one 54

Step-by-step explanation:

I hope it helps.

4 0

3 years ago