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3 years ago

You flip a fair coin 7 times. What is the probability that the coin lands with the heads side up exactly 3 out of the 7 times?

Mathematics

1 answer:

Liono4ka [1.6K]3 years ago

5 0

Answer:

35/128 ≈ 0.2374

Step-by-step explanation:

The number of combinations of 7 things taken 3 at a time is ...

7·6·5/(3·2·1) = 7·5 = 35

The number of sequences in which the coins can land is 2^7 = 128.

Of those 128 sequences, 35 will have exactly 3 heads.

The probability is 35/128.

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(6,3*10^-2)÷(2,1*10^4

nexus9112 [7]

Answer:

$3*10^{-6}$ or $0.000003$

Given expression:

$(6.3*10^{-2}) : (2.1*10^4)$

Simplify it in steps below:

$(6.3*10^{-2}) : (2.1*10^4) =$
$(6.3 :2.1)*(10^{-2}:10^4)=$
$3*(10^{-2-4})=$
$3*10^{-6}$ or $0.000003$

<u>Used properties:</u>

$\cfrac{ab}{cd}=\cfrac{a}{c}*\cfrac{b}{d}$

$a^b:a^c=a^{b-c}$

$a^{-b}=1/a^b$

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1 year ago

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Line Q has a slope of 3. Line R is parallel to line Q.What is the slope of line R?

Vladimir [108]

Answer:

Step-by-step explanation:

Parallel lines have the same slope

So if line Q has a slope of 3

Line R which is parallel to Q must have a slope of 3

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3 years ago

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kicyunya [14]

Answer:

hardd sorry

Step-by-step explanation:>..

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3 years ago

A scientist is studying wildlife in Ohio and she estimates that the population of bats is tripling every year. If she had counte

Sloan [31]

The number of bats that there would be in 2021 would be 768,000.

<h3>What would be the number of bats in 2021?</h3>

The formula that can be used to determine the future value of bats in 2021 is:

FV = P (1 + r)^n

Where:

FV = Future value
P = Present value = 3000
R = interest rate = 300%

N = number of years = 4

3000(1 + 3)^4

3000 x 4^4 = 768,000

To learn more about future value, please check: brainly.com/question/18760477

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