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Karolina [17]
2 years ago
7

Worldwide, the proportion of babies who are boys is about 0.51 . Let the random variable X represent the number of boys in five

children. Find the mean and standard deviation of this random variable.
Mathematics
1 answer:
solmaris [256]2 years ago
6 0

Answer:

mean = 2.55

Standard deviation = 1.118

Step-by-step explanation:

Probability of babies who are boys

P = 0.51

Then we have q = 1-p

= 1-0.51

= 0.49

We have n = 5

We calculate the mean as:

np

= 0.51x5

= 2.55

Therefore mean = 2.55

The standard deviation

= √variance

= √npq

= √0.51x5x0.49

=√1.2495

= 1.118

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Use the Distributive Property to write each expression as an equivalent algebraic expression.
Romashka [77]

Answer:

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Step-by-step explanation:

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Read 2 more answers
The sum of three consecutive number is 54<br> Find the first two<br> number.​
nirvana33 [79]
  • <em>Answer:</em>

<em>a = 17</em>

<em>b = 18</em>

<em>c = 19</em>

  • <em>Step-by-step explanation:</em>

<em>Hi there ! </em>

<em>a + b + c = 54</em>

<em>b = a + 1</em>

<em>c = a + 2</em>

<em>replace b ; c</em>

<em>a  + (a + 1) + (a + 2) = 54</em>

<em>3a = 54 - 3</em>

<em>3a = 51</em>

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<em>Good luck !</em>

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3 years ago
1 poir
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9514 1404 393

Answer:

  $1790.99

Step-by-step explanation:

<u>Given</u>:

  $1625 is invested at an annual rate of 1.95% compounded quarterly for 5 years

<u>Find</u>:

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The compound interest formula applies.

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The account ending balance would be $1790.99.

8 0
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