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butalik [34]
3 years ago
12

WHAT IS NINE TENTHS OF NINETY POUNDS

Mathematics
1 answer:
PtichkaEL [24]3 years ago
4 0
     90 * 0.9 = 81  All you do is change 9/10ths to a decimal 0.9 and multiply 90 by 0.9 your answer is 81
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Is 5(b+3) equivalent to 3(b+5)?​
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Which rational number must be added to3\7to get -3\4 ?
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3 years ago
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.

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3 years ago
Witch best describes a triangle acute obtuse right or equlateral
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The answer would be right triangle. Hope that helps! :3

Oh and you spelled which wrong.
6 0
3 years ago
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