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3 years ago

The probability that a person in the United States has type B+ blood is 13%.

Mathematics

1 answer:

blondinia [14]3 years ago

3 0

Answer:

Step-by-step explanation:

Given that the probability that a person in the United States has type B+ blood is 13%.

Since four unrelated people in the United States are selected at random, we can say that each person is independent of the other to have B+ blood group.

Let X be the number of persons who have blood group B+ in the group of 4 persons.

X is Binomial with p = 0.13

a) P(X = 4) = $(0.13)^4 = 0.000286$

b) P(x =0) = $(1-0.13)^4 = 0.572898$

c) $P(X\geq 10 = 1-P(0) = 0.427102$

d) All having B+ is unusual since probability is very negligible

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Write each ratio statement as a fraction and reduce to lowest terms if possible:

qwelly [4]

The answers are:

18 to 24 = $\frac{18}{24} = \frac{3}{4}$

5 to 15 = $\frac{5}{15} = \frac{1}{3}$

14:42 = $\frac{14}{42} = \frac{1}{3}$

15 cents to 18 cents = $\frac{15}{18} = \frac{5}{6}$

Explanation:

To write a fraction using a ratio, simply use the first number as the numerator (top number), in this case, the numbers 18, 5, 14, and 15, and the second or biggest number as a denominator (bottom number), in this case, the numbers 24, 15, 42 and 18. This means the fractions are $\frac{18}{24}$ , $\frac{5}{15}$ , $\frac{14}{42}$ , and $\frac{15}{18}$ .

The second step is to reduce or simplify the fractions, which means the numbers in a fraction are divided by the same factor (a number that divides another without a remainder). Additionally, to do this, it is important to reduce the fraction to its minimum.

$\frac{18}{24}$ divide this by 6, which is equivalent to $\frac{3}{4}$

$\frac{5}{15}$ divide this by 5, which is equivalent to $\frac{1}{3}$

$\frac{14}{42}$ divide this by 14. which is equivalent to $\frac{1}{3}$

$\frac{15}{18}$ divide this by 3, which is equivalent to $\frac{5}{6}$

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3 years ago

95=6x-5(-x-8) <br>Solve for x

Allushta [10]

<span>95=6x-5(-x-8)

Distribute the -5

95 = 6x + 5x + 40

Subtract 40 from both sides and combine like terms

55 = 11x

Divide both sides by 11

x=5</span>

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3 years ago

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The diagonals of rhombus team intersect at p(2,1). if the equation of the line that contains diagonal (ta) is y = −x + 3, what i

notka56 [123]

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