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3 years ago

Si 22 patos tienen comida para 10 dias, si tenemos 5 patos ¿cuantos días tendrían comida?

Mathematics

1 answer:

snow_tiger [21]3 years ago

7 0

Answer:

$44$

Step-by-step explanation:

Formulate equation/expression:

$22 \times 10 \div 5$

Calculate:

$\frac{22 \times10 }{5}$

Reduce the fraction:

$22 \times 2$

Calculate the product or quotient:

$44$

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Answer:

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Step-by-step explanation:

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3 years ago

How to round 254 to the nearest hundred

Lisa [10]

One way is using the rules.

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How do you express equivalent equation

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Http://www.icoachmath.com/math_dictionary/equivalent_equations.html

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3 years ago

第 5 个问题 a multiple choice exam has 10 questions. each question has 3 possible answers, of which one is correct. a student knows

tatuchka [14]

The chances that the student was merely guessing is 1/3.

Bayes Theorem determines the conditional probability of an event A given that event B has already occurred.

denoted by

$P(A/B)=\frac{P(A)*P(B/A)}{P(B)}$

let A be the event that the student knows the answer .

B be the event that the student does not knows the answer .

and

E be the event he gets answer correct .

According to the given question

$P(A)=\frac{4}{10} \\\\ P(B)=1-\frac{4}{10} =\frac{6}{10}$

Probability that the answer is correct ,given that he knows the answer is

$P(E/A)=1$

Probability that the answer is correct ,given that he guesses it is

$P(E/B)=\frac{1}{3}$ [as the MCQ has 3 options and only one is correct]

We need to find the probability that he guesses the answer given that it is correct.

Required probability $P(B/E)=\frac{P(B)*P(E/B)}{P(A)*P(E/A)+P(B)*P(E/B)}$

Substituting the values we get

$P(B/E)=\frac{\frac{6}{10} *\frac{1}{3} }{\frac{4}{10} *1+\frac{6}{10} *\frac{1}{3} }$

$=\frac{6}{30}*\frac{30}{18} \\ \\ =\frac{6}{18} \\ \\ =\frac{1}{3}$

Therefore , the chances that the student was merely guessing is 1/3.

Learn more about Probability here brainly.com/question/13140147

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1 year ago

Lucas bought 3 iPads for a total of $360. At this rate, what is the cost of 2 iPads?

weeeeeb [17]

Answer:

240

Step-by-step explanation:

360 divided by 3 is 120 so 2 times 120 is 240

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3 years ago

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