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3 years ago

I don't get this question plz help

Mathematics

1 answer:

andre [41]3 years ago

5 0

X is 45°
Y is 80°
Z is the difference of 180° and (80°+45°)

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What is the meaning of a list

astraxan [27]

The meaning of a list is something you make when you want to remember words or organize word
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3 years ago

A stationary store has decided to accept a large shipment of ball-point pens if an inspection of 17 randomly selected pens yield

Leno4ka [110]

Answer:

0.762 = 76.2% probability that this shipment is accepted

Step-by-step explanation:

For each pen, there are only two possible outcomes. Either it is defective, or it is not. The probability of a pen being defective is independent from other pens. So we use the binomial probability distribution to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

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

In which $C_{n,x}$ is the number of different combinations of x objects from a set of n elements, given by the following formula.

$C_{n,x} = \frac{n!}{x!(n-x)!}$

And p is the probability of X happening.

17 randomly selected pens

This means that $n = 17$

(a) Find the probability that this shipment is accepted if 10% of the total shipment is defective. (Use 3 decimal places.)

This is $P(X \leq 2)$ when $p = 0.1$ . So

$P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2)$

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

$P(X = 0) = C_{17,0}.(0.1)^{0}.(0.9)^{17} = 0.167$

$P(X = 1) = C_{17,1}.(0.1)^{1}.(0.9)^{16} = 0.315$

$P(X = 2) = C_{17,2}.(0.1)^{2}.(0.9)^{15} = 0.280$

$P(X \leq 2) = P(X = 0) + P(X = 1) + P(X = 2) = 0.167 + 0.315 + 0.280 = 0.762$

0.762 = 76.2% probability that this shipment is accepted

8 0

3 years ago

What are the points of intersections of the function g(x)=x+1

inessss [21]

Answer:x=1

Step-by-step explanation:

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3 years ago

Totsaken sold half of his comic books and bought ten more. He now has 40. With how many did he begin?

AURORKA [14]

The answer is 60 because

40-10*2=60

hope it helps

8 0

2 years ago

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What is the solution of the system? y=2 x= -1

kodGreya [7K]

Answer:

( -1,2)

Step-by-step explanation:

The solution is where the two lines intersect

The intersect at x=-1 and y=2

( -1,2)

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3 years ago

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