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3 years ago

6

Customers arrive randomly at a service point at an average rate of 30 per hours.Assuming a Possition distibution,calculate the p

robability that
a.no customers arrive in a particular minute.
b.exactly one customer arrives in five minutes.
c.at most one customer arrive in ten minutes.

1 answer:

inna [77]3 years ago

4 0

Answer:

honestly man I say go with c

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Answer:

$x=-1$ or $7$

Step-by-step explanation:

We use casework on when $3x-9=12$ and when $3x-9=-12$ .

For the first case, $3x-9=12$ , we add 9 to both sides to get

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For the second case, $3x-9=-12$ , we add 9 to both sides to get

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Dividing both sides by 3 gives

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Checking both cases, we plug in $x=7$ and $x=-1$ .

For the first case, we have $|3(7)-9|=|21-9|=|12|=12$ , which satisfies the equation.

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2 years ago

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jek_recluse [69]

Answer:

$S_{31}=71.3$

Step-by-step explanation:

The nth term of an arithmetic sequence is given by the formula,

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To find $S_{31}$ , we substitute $n=31$ , $a_1=\frac{169}{5}$ and $d=-2.1$ .

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$\Rightarrow S_{31}=\frac{713}{10}$

$\Rightarrow S_{31}=71.3$

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