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Vinvika [58]
2 years ago
7

Hellpppppppppppppppppp

Mathematics
2 answers:
attashe74 [19]2 years ago
7 0

Answer:

9+(-6)

Step-by-step explanation:

because the + sign doesn't change anything due to the parentheses which are indicating you that is 9-6, and if you have to solve it the answer would be 3, because they are different signs so you have to divide them and leave the sign of the greater number in this case 9, so the answer would be positive 3

Nikolay [14]2 years ago
3 0

Answer:

9 + (-6)

Step-by-step explanation:

9-6=3

9 + (-6)= 3

Hope it will help you

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Answer:

n=48

Step-by-step explanation:

n  

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3

Multiply each side by 3

n/3 * 3 = 16*3

n = 48

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3 years ago
A multiple choice test is composed of 10 questions. Each question has four possible answers, only one of the four possible answe
kompoz [17]

Answer:

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And the expected value is given by:

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Step-by-step explanation:

Previous concepts

A Bernoulli trial is "a random experiment with exactly two possible outcomes, "success" and "failure", in which the probability of success is the same every time the experiment is conducted". And this experiment is a particular case of the binomial experiment.

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The probability mass function for the Binomial distribution is given as:  

P(X)=(nCx)(p)^x (1-p)^{n-x}  

Where (nCx) means combinatory and it's given by this formula:  

nCx=\frac{n!}{(n-x)! x!}  

Solution to the problem

Let X the random variable of interest "Number of correct anwers on the tet", on this case we now that:

X \sim Binom(n=10, p=0.25)

And the expected value is given by:

E(X) = np =10*0.25 = 2.5

4 0
2 years ago
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