The probability of an event and the probability of its complement always sum to: 1. -1 2. 0 3. 1 4. Any value between 0 and 1

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Answer 1

The probability of an event and the probability of its complement always sum to 1.

The probability of an event and its complement refers to the likelihood of either the event occurring or its opposite (not occurring). In any probability space, the sum of these two probabilities must always equal 1.

This can be understood using the concept of the sample space, which represents all possible outcomes of an experiment. The event and its complement together cover the entire sample space, leaving no room for other outcomes. Therefore, the sum of their probabilities must account for the entire probability space, which is equal to 1.

In other words, if the probability of an event occurring is P(A), then the probability of its complement (not A) occurring is 1 - P(A). Adding these probabilities together yields 1:

P(A) + P(not A) = P(A) + (1 - P(A)) = 1

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Related Questions

He pays $4 for parking an $12 for each pizza he buys. If he pays a total of $52 how many pizzas did he buy

Answers

The person bought 4 pizzas.

Let's assume the number of pizzas the person bought is "p".

We are given that he pays $4 for parking and $12 for each pizza he buys. So, the total cost can be calculated as follows:

Total cost = $4 (for parking) + $12 × p (for pizzas)

According to the problem, the total cost is $52. We can write this as an equation:

$4 + $12p = $52

To find the value of "p," we need to solve this equation:

$12p = $52 - $4

$12p = $48

Now we divide both sides of the equation by $12 to solve for "p":

p = $48 / $12

p = 4

Therefore, the person bought 4 pizzas.

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consider the expression 3 * 2 ^ 2 < 16 5 andalso 100 / 10 * 2 > 15 - 3. which operation is performed first?

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In the given expression, the multiplication and division operations are performed first, followed by any addition and subtraction operations.

To evaluate the given expression, we need to break it down into individual operations and then apply the order of operations. Let's analyze each operation step by step:

Parentheses: In this expression, there are no parentheses, so we can skip this step.

Exponents: The exponentiation operation is denoted by the "^" symbol. However, in this expression, there are no exponents.

Multiplication and Division: The multiplication and division operations are performed from left to right. In the given expression, we have two multiplication operations: "[tex]3 * 2 ^ 2[/tex]" and "100 / 10 * 2." According to the order of operations, we need to evaluate these multiplications before moving on to other operations.

First, let's consider "[tex]3 * 2^2[/tex]" In this case, the exponentiation operation (^) takes precedence over multiplication. Therefore, we need to evaluate "[tex]2^2[/tex]" first. Since 2 raised to the power of 2 is 4, the expression becomes "3 * 4."

Next, we have "100 / 10 * 2." As there are no other operations to perform before division, we can proceed with evaluating this expression. The division of 100 by 10 results in 10, and then multiplying by 2 gives us 20.

Addition and Subtraction: The addition and subtraction operations are also performed from left to right. In the given expression, we have "16 5" and "15 - 3" as the remaining operations.

Let's consider "16 5" first. The expression "16 5" is ambiguous because there is no operator between the numbers. It is essential to have a proper operator like ">" or "<" to determine the relationship between the two numbers. Without it, the expression is invalid.

Finally, we have "15 - 3." Subtracting 3 from 15 gives us 12.

Now that we have evaluated each operation, we can rewrite the expression as "3 * 4 < 12 and also 20 > 12."

To summarize, the operations are performed in the following order:

Exponents (if any)

Multiplication and Division (from left to right)

Addition and Subtraction (from left to right)

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light with a wavelength of 694 nmnm passes through a slit 7.90 μmμm wide and falls on a screen 1.95 mm away.

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Using the given values, we can calculate the angle of diffraction (θ) and the distance between adjacent bright fringes (y).

How to analyze the diffraction of light passing through a narrow slit?

To analyze the diffraction of light passing through a narrow slit, we can use the concept of the single-slit diffraction equation:

sin(θ) = (m * λ) / w

Where:

- θ is the angle of diffraction

- m is the order of the bright fringe

- λ is the wavelength of light

- w is the width of the slit

Given:

- Wavelength (λ) = 694 nm = 694 × 10^(-9) m

- Slit width (w) = 7.90 μm = 7.90 × 10^(-6) m

- Distance to the screen (D) = 1.95 mm = 1.95 × 10^(-3) m

First, let's calculate the angle of diffraction (θ):

θ = sin^(-1)((m * λ) / w)

Now, let's calculate the distance between adjacent bright fringes (y):

y = (m * λ * D) / w

Using the given values, we can calculate the angle of diffraction (θ) and the distance between adjacent bright fringes (y).

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Hazel is saving her allowance to buy a new handbag to match her favorite dress. The handbag is shaped like a trapezoid with one base that is 23 centimeters long and another base that is 17 centimeters long. The trapezoid has an area of 260 square centimeters. What is the height of the trapezoid? Write your answer as a whole number or decimal. Do not round.

Answers

The height of the trapezoid is 13cm.

What is the height of the trapezoid?

A trapezoid is a convex quadrilateral with at least one pair of parallel sides.

Area of a trapezoid =   0.5 x (sum of the lengths of the parallel sides) x height

Height = area / (0.5 x sum of lengths)

Sum of lengths = 23 + 17 = 40 cm

= 260 / (0.5 x 40) = 13 cm

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Given: Tangent

TA



KM


Prove:

KS



MS

Answers

Answer:

the statement KS ≅ MS is true based on the congruence of the angles KST and MST.

Step-by-step explanation:

Based on the given information that TA is parallel to KM, we can apply the alternate interior angles theorem for parallel lines. According to the theorem, when a transversal intersects two parallel lines, the alternate interior angles are congruent.

In this case, the angles KST and MST are alternate interior angles formed by the transversal line KS and the parallel lines TA and KM. Since the lines TA and KM are parallel, we can conclude that:

KST ≅ MST

help i cant solve this

Answers

Answer:

[tex]\huge\boxed{\sf 44\ units}[/tex]

Step-by-step explanation:

Perimeter:Sum of all sides of a figure is known as perimeter of that figure.

Solution:

So,

Perimeter of this figure:

= 3 + 8 + 3 + 6 + 5 + 6 (again) + 4 + 5 + 4

= 44 units

[tex]\rule[225]{225}{2}[/tex]

Answer:

8-4=4

therefore 6+4=10

then perimeter =2(5)+10+6+2(3)+8+4=44units

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