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3 years ago

Does anyone know this?

Mathematics

2 answers:

Gnom [1K]3 years ago

8 0

Answer: 8.6?

Step-by-step explanation:

jolli1 [7]3 years ago

5 0

D E would most likely be 8,6

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You go to a shop that sells tricycles. there are 18 wheels in the wheel shop. how many tricycles are in the shop?

kherson [118]

Answer:

I think there are 6 Tricycles in the shop.

Step-by-step explanation:

There is 3 wheels in a tricycle and 18 divided by 3 is 6.

3 0

3 years ago

Question 3<br> Which verbal expression shows 4+ n?

Natalka [10]

Answer:

- N more than 4.

- 4 plus n.

-4 added with n.

Are some types of verbal expression for this expression.

8 0

3 years ago

A company is interviewing potential employees. Suppose that each candidate is either qualified, or unqualified with given probab

stira [4]

Answer:

$P(C=1|T=1)=q(\sum_{i=15}^{20}\binom{20}{i} p^i(1-p)^{20-i})( \sum_{i=15}^{20}\binom{20}{i}[qp^i(1-p)^{20-i} + (1-q)p^{20-i}(1-p)^i])^{-1}$

Step-by-step explanation:

Hi!

Lets define:

C = 1 if candidate is qualified

C = 0 if candidate is not qualified

A = 1 correct answer

A = 0 wrong answer

T = 1 test passed

T = 0 test failed

We know that:

$P(C=1)=q\\P(A=1 | C=1) = p\\P(A=0 | C=0) = p$

The test consist of 20 questions. The answers are indpendent, then the number of correct answers X has a binomial distribution (conditional on the candidate qualification):

$P(X=x | C=1)=f_1(x)=\binom{20}{x}p^x(1-p)^{20-x}\\P(X=x | C=0)=f_0(x)=\binom{20}{x}(1-p)^xp^{20-x}$

The probability of at least 15 (P(T=1))correct answers is:

$P(X\geq 15|C=1)=\sum_{i=15}^{20}f_1(i)\\P(X\geq 15|C=0)=\sum_{i=15}^{20}f_0(i)\\$

We need to calculate the conditional probabiliy P(C=1 |T=1). We use Bayes theorem:

$P(C=1|T=1)=\frac{P(T=1|C=1)P(C=1)}{P(T=1)}\\P(T=1) = qP(T=1|C=1) + (1-q)P(T=1|C=0)$

$P(T=1)=q\sum_{i=15}^{20}f_1(i) + (1-q)\sum_{i=15}^{20}f_0(i)\\P(T=1)=\sum_{i=15}^{20}\binom{20}{i}[qp^i(1-p)^{20-i} + (1-q)p^{20-i}(1-p)^i)]$

$P(C=1|T=1)=q(\sum_{i=15}^{20}\binom{20}{i} p^i(1-p)^{20-i})( \sum_{i=15}^{20}\binom{20}{i}[qp^i(1-p)^{20-i} + (1-q)p^{20-i}(1-p)^i])^{-1}$

5 0

3 years ago

Write an inequality for the given statement:the sum of x and 25 is less than 75

tiny-mole [99]

Answer:

$x + 25 < 75$ ; $x < 50$

Step-by-step explanation:

The inequality says the sum of x and 25 (written as x + 25) is less than (<) 75.

The inequality is written as: $x + 25 < 75$

My work for solving the inequality is in the picture.

4 0

3 years ago

What shapes have 4 sides

Alex_Xolod [135]

Squares
Rectangles
Rhombus
Trapezoid
Parallelogram
Quadrilateral

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3 years ago

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