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AnnyKZ [126]
3 years ago
8

Anna makes 120 dolls each month to sell . This month, she increase the number of dolls she makes by 30% . How many dolls does An

na make this month?
Mathematics
1 answer:
nalin [4]3 years ago
5 0

Answer:156

Step-by-step explanation:

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There are 3 boxes. First box contains 100 components of which 20 % are defective, second box contains 200 components of which 25
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Answer:

Step-by-step explanation:

Given that there are 3 boxes. First box contains 100 components of which 20 % are defective, second box contains 200 components of which 25 % are defective, third box contains 300 components of which 40 % are defective.

Box is selected randomly and from this box one component is selected randomly. The chosen component turned out to be defective.

Here A1, A2 and A3 events from drawing I, II and III box are mutually exclusive and exhaustive

B = The drawn ball is defective

Required probability

a) second box = P(A2/B)

=\frac{P(A_2B)}{P(A_1B+P(A_2B+P(A_3B}

(by Bayes theorem of conditional probability)

= \frac{\frac{1}{3} 0.25}{\frac{1}{3} 0.20)+\frac{1}{3} 0.25)+\frac{1}{3} 0.40)} \\=\frac{25}{85} \\=\frac{5}{17}

b) third box = P(A3/B)

=\frac{\frac{1}{3} 0.40}{\frac{1}{3} 0.20)+\frac{1}{3} 0.25)+\frac{1}{3} 0.40)} \\=\frac{40}{85} \\=\frac{8}{17}

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The mass of one methane molecule is 2.7x10^-23gram. Find the mass of 90,000 molecules of methane. Express the answer in scientif
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2.43 • 10^-18

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Correct is AB = DC

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The range of this function
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Answer: C

Step-by-step explanation: The range of a function is all the outputs, or in this case all the values on the right side of the function. Therefore, we just look at what numbers are there and we find the range

 

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