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Goshia [24]
3 years ago
12

What is 485=? Tens +5units

Mathematics
1 answer:
spin [16.1K]3 years ago
4 0
48 ten units and 1 five unit.
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If that 25/4 is a fraction them the answer is 53/4. Or in simplest form 3 5/16 or 3.3125
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Helpppppppp pls help .
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Step-by-step explanation: i tried my best

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Stan's back account balance is less than -20.00 dollars but greater than -21.00. what could stan's account balance be?
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Mary is building a sandcastle with rectangular prism molds. One mold is 4 inches long, 6 inches wide, and 2 inches tall. The oth
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63 cubic inches

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6. If a person adopts a pet, it's either a cat or a dog. 25% of the time, it's a cat and 75% of the time, it's a dog. If you mee
alina1380 [7]

Answer:

0.0156 probability that they got three cats.

0.4219 probability that they got three dogs.

Step-by-step explanation:

For each person there are only two possible outcomes. Either they adopted a dog, or a cat. The probability of a person adopting a cat or a dog is independent of any other person, which means that the binomial probability distribution is used to solve this question.

Binomial probability distribution

The binomial probability is the probability of exactly x successes on n repeated trials, and X can only have two outcomes.

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

In which C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

And p is the probability of X happening.

Three people:

This means that n = 3

What's the probability that they got three cats?

25% of the time it's a cat adopted, which means that p = 0.25

This is P(X = 3). So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{3,3}.(0.25)^{3}.(0.75)^{0} = 0.0156

0.0156 probability that they got three cats.

What's the probability that they got three dogs?

75% of the time it's a dog adopted, which means that p = 0.75

This is P(X = 3). So

P(X = x) = C_{n,x}.p^{x}.(1-p)^{n-x}

P(X = 3) = C_{3,3}.(0.75)^{3}.(0.25)^{0} = 0.4219

0.4219 probability that they got three dogs.

6 0
3 years ago
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