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4 years ago

-2(6+s) < -16 + 2s What is the answer

Mathematics

1 answer:

topjm [15]4 years ago

5 0

Answer:

s>1 or 1<s

Step-by-step explanation:

-2(6+s)<-16+2s

-12-2s<-16+2s

4<4s

1<s

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Read 2 more answers

120 A particular telephone number is used to receive both voice calls and fax messages. Suppose that 25% of the incoming calls i

seropon [69]

Answer:

a)0.5611

b)0.1828

c)0.6217

d)0.4389

e)6.25

Step-by-step explanation:

Let's define the following event :

X : ''Calls involving a fax message''

The random variable X can be modeled as a Binomial random variable.

N ~ Bi(n,p)

N ~ Bi(25,0.25)

Where n is the sample and p is the success probability

Let's also define nCr as the combinatorial number :

$nCr=\frac{n!}{r!(n-r)!}$

The probability function for X is :

$P(X=k)=nCk.p^{k}.(1-p)^{n-k}$

Where k is the number of success

a) $P(X\leq 6)$

$P(X\leq 6)=P(X=0)+P(X=1)+P(X=2)+P(X=3)+P(X=4)+P(X=5)+P(X=6)$

$P(X\leq 6)=0.5611$

b) $P(X=6)=25C6.(0.25)^{6}.(1-0.25)^{19}=0.1828$

c) $P(X\geq 6)=1-P(X$

d) $P(X>6)=1-P(X\leq 6)=1-0.5611=0.4389$

e) They are asking us about the expected value for random variable X

In a Binomial random variable :

E(X) = μ = n.p

$E(X)=25(0.25)=6.25$

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3 years ago