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3 years ago

BRAINLIEST!!PLEASE HELP ME!

Mathematics

2 answers:

liberstina [14]3 years ago

8 0

IF i did my math correct it should be the 2nd answer b

Serjik [45]3 years ago

6 0

D-3a=3b
(d-3a)/3=b
Answer is second from top to down

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The number of typing errors made by a typist has a Poisson distribution with an average of seven errors per page. If more than s

Aleks [24]

Answer:

0.599 is the probability that a randomly selected page does not need to be retyped.

Step-by-step explanation:

We are given the following in the question:

The number of typing errors made by a typist has a Poisson distribution.

$\lambda =7$

The probability is given by:

$P(X =k) = \displaystyle\frac{\lambda^k e^{-\lambda}}{k!}\\\\ \lambda \text{ is the mean of the distribution}$

We have to find the probability that a randomly selected page does not need to be retyped

P(less than or equal to 7 mistakes in a page)

$P( x \leq 7) = P(x =1) + P(x=1) +...+ P(x=6) + P(x = 7)\\\\= \displaystyle\frac{7^0 e^{-7}}{0!} + \displaystyle\frac{7^1 e^{-7}}{1!} +...+ \displaystyle\frac{7^6 e^{-7}}{6!} + \displaystyle\frac{7^7 e^{-7}}{7!} \\\\= 0.59871\approx 0.599$

Thus, 0.599 is the probability that a randomly selected page does not need to be retyped.

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3 years ago

Find the difference 9 3/8-8 7/8

olchik [2.2K]

1/2

3/8 - 7/8

Add 8 to the three and do 9-1 to get 11/8 and 8.

8-8=0

11/8 - 7/8 = 4/8

Simplify to 1/2

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3 years ago

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Digiron [165]

Answer:

3(5y-7z)

Step-by-step explanation:

3x5=15

7x3=21

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2 years ago

Evaluate the expression 3.14(a2 + ab) when a = 3 and b = 4. (Input decimals only, such as 12.71, as the answer.)

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3.14+18
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3 years ago

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