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3 years ago

HELP ! I have math soon

Mathematics

1 answer:

frosja888 [35]3 years ago

6 0

X=12 or 12+x or x+12 let me know if that gave u a idea and helped thanks

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Past records indicate that the probability of online retail orders that turn out to be fraudulent is 0.08. Suppose that, on a gi

Sunny_sXe [5.5K]

Answer:

The probability that there are 2 or more fraudulent online retail orders in the sample is 0.483.

Step-by-step explanation:

We can model this with a binomial random variable, with sample size n=20 and probability of success p=0.08.

The probability of k online retail orders that turn out to be fraudulent in the sample is:

$P(x=k)=\dbinom{n}{k}p^k(1-p)^{n-k}=\dbinom{20}{k}\cdot0.08^k\cdot0.92^{20-k}$

We have to calculate the probability that 2 or more online retail orders that turn out to be fraudulent. This can be calculated as:

$P(x\geq2)=1-[P(x=0)+P(x=1)]\\\\\\P(x=0)=\dbinom{20}{0}\cdot0.08^{0}\cdot0.92^{20}=1\cdot1\cdot0.189=0.189\\\\\\P(x=1)=\dbinom{20}{1}\cdot0.08^{1}\cdot0.92^{19}=20\cdot0.08\cdot0.205=0.328\\\\\\\\P(x\geq2)=1-[0.189+0.328]\\\\P(x\geq2)=1-0.517=0.483$

The probability that there are 2 or more fraudulent online retail orders in the sample is 0.483.

5 0

3 years ago

Elevii clasei a IV-a au fost la patinoar. Stiind ca numarul baietilor reprezinta jumatate plus 3 din numarul copiilor si ca numa

Shalnov [3]

Step-by-step explanation:

Fie x numărul de copii

$f = 10$ $=\:fete$

$b\:=\:\frac{x}{2}\:+\:3$

$f\:+\:b\:=\:x$

$10\:+\:\frac{x}{2}\:+\:3\:=\:x$

$20\:+\:x\:+\:6\:=\:2x$

$x\:=\:26\:copii\:au\:fost\:la\:patinoar$

$b=\frac{26}{2}+\:3$

$b\:=\:16\:baieti$

7 0

3 years ago

which of the following is not a rate? 95 words/1 minute, 16 oz/1lb, 240 miles/8 minutes, 35 km/5 minutes

miv72 [106K]

Answer:

16 0z/1 ib

Step-by-step explanation:

it is not a quantity over time

5 0

3 years ago

Read 2 more answers

Pls help with all the answers m

stiks02 [169]

Answer:

every answer except -40 and -20

answer:-77,-100,-45

8 0

3 years ago

What is the value of the expression 2 x 33 + 17 + 5 x 8

snow_lady [41]

Answer:

Correct answer of this question is 123

5 0

2 years ago