4 years ago

The cost of a student ticket is $7 write a equation that correctly relates the total cost

Mathematics

1 answer:

daser333 [38]4 years ago

6 0

X=$7 | 1 Ticket= x | 1 Ticket = $7

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In a semiconductor manufacturing process, three wafers from a lot are tested. Each wafer is classified as pass or fail. Assume t

Angelina_Jolie [31]

Answer:

$P(X = 0) = 0.027$

$P(X = 1) = 0.189$

$P(X = 2) = 0.441$

$P(X = 3)= 0.343$

Step-by-step explanation:

The probability mass function P(X = x) is the probability that X happens x times.

When n trials happen, for each $x \leq n$ , the probability mass function is given by:

$P(X = x) = pe_{n,x}.p^{x}.(1-p)^{n-x}$

In which p is the probability that the event happens.

$pe_{n,x},$ is the permutation of n elements with x repetitions(when there are multiple events happening(like one passes and two not passing)). It can be calculated by the following formula:

$pe_{n,x} = \frac{n!}{x!}$

The sum of all P(X=x) must be 1.

In this problem

We have 3 trials, so $n = 3$

The probability that a wafer pass a test is 0.7, so $p = 0.7$

Determine the probability mass function of the number of wafers from a lot that pass the test.

$P(X = 0) = (0.7)^{0}.(0.3)^{3} = 0.027$

$P(X = 1) = pe_{3,1}.(0.7).(0.3)^{2} = 0.189$

$P(X = 2) = pe_{3,2}.(0.7)^{2}.(0.3) = 0.441$

$P(X = 3) = (0.7)^{3} = 0.343$

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4 years ago

Your insurance premium is $3400 annually. Your employer pays 80% of the premium. How much will you pay annually?

pochemuha

I think it is 680 if not i am sorry

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3 years ago

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Solve the following system of equations using the SUBSTITUTION method. Show all your work! x = 2y + 1 x + y = 4

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Answer:

Step-by-step explanation:

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x-2y=8

then;

x=8-2y

substitute;

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32-8y+8-2y=14

40-10y=14

26=10y

y=2.6 , work out 4x+2.6=14 to get x

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Answer:

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Step-by-step explanation:

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In 1979 the Wincom river was 33 feet below the bridge. Because of silt build-up in the river bottom, the

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