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Talja [164]
3 years ago
8

Suppose there are 8 runners competing in the 400 meter race. The fastest three runners will win a ribbon. In how many ways can r

unners finish first, second, and third place?
Mathematics
1 answer:
yKpoI14uk [10]3 years ago
6 0

Answer:

^8C_3=336way

Step-by-step explanation:

From the question we are told that

Number of runners N=8

Distance d=400m

Generally the top three places can be determined mathematically as        

     ^8C_3

     ^8C_3=336way

therefore the top three can be determined in 336ways

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Answer:

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Step-by-step explanation:

13/26 is 1/2

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what number, when added to the numerator and to the denominator of $\frac{5}{8}$, results in a fraction whose value is 0.4?
luda_lava [24]

The required number is -3 which when added to the numerator and to the denominator of 5/8 results in a fraction whose value is 0.4.

<h3>What is a fraction?</h3>

Fraction is the ratio of a particular part to the whole parts of an object. A fraction has a numerator and a denominator.

<h3>Calculation:</h3>

The given fraction is 5/8

Consider a number as 'x' which is added to both the numerator and the denominator of the given fraction.

So,

(5 + x)/(8 + x)

Since it is given that the result is 0.4 i.e., 4/10, we can write

(5 + x)/(8 + x) = 4/10

⇒ 10(5 + x) = 4(8 + x)

⇒ 50 + 10x = 32 + 4x

⇒ 10x - 4x = 32 - 50

⇒ 6x = -18

⇒ x = -18/6

∴ x = -3

Therefore, the required number is -3.

Check:

(5 + (-3))/(8 + (-3)) = (5 - 3)/(8 - 3) = 2/5 = 0.4

Learn more about fractions here:

brainly.com/question/17220365

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3 0
2 years ago
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Step-by-step explanation:

$3.00 divided by 2 pounds is $1.5

$4.50 divided by 3 pounds is $1.5

and $6.00 divided by 4 pounds $1.5

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