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3 years ago

1) Solve for x. x+23=−22 2) Solve for a. a+(−1.3)=−4.5

Mathematics

2 answers:

8090 [49]3 years ago

6 0

X+23=-22
-23 -23

x=-45

a+(-1.3)=-4.5

or

a-1.3+-4.5
+1.3 +1.3

a=3.2

Sphinxa [80]3 years ago

3 0

1 ) x 23 = -22

equals: x = -45

2 ) a + (-1.3) = 4.5

equals: a = -3.2

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Answer:

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We have a sample of size n=4, taken out of a lot of N=12 units, where K=3 are non-conforming units.

We can write the probability mass function as:

$P(x=k)=\frac{\binom{K}{k}\binom{N-K}{n-k}}{\binom{N}{n}}$

where k is the number of non-conforming units on the sample of n=4.

We can calculate the probability of getting no non-conforming units (k=0) as:

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We can calculate the probability of getting one non-conforming units (k=1) as:

$P(x=1)=\frac{\binom{3}{1}\binom{9}{3}}{\binom{12}{4}}=\frac{3*84}{495}=\frac{252}{495} = 0.51$

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