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Dahasolnce [82]

3 years ago

14

Is two ratios are formed at random from the four numbers 1,2,4, and 8 what is the probability that the rations are equal? Show w

orks please?

2 answers:

astra-53 [7]3 years ago

7 0

4/8 because you could make the ratios 1/2 and 4/8 and 1/4 and 2/8 8/2 and 4/1

Mariulka [41]3 years ago

4 0

Answer:

no idea

Step-by-step explanation:

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craig likes to collect records. last year he had 10 records in his collection. now he has 15 records. what is the percent increa

schepotkina [342]

Answer:

His collection increased in a 20%.

Step-by-step explanation:

If 100% represents 10 records, what percentage would be for 12 records?

x = 12 100% / 10 = 120%

So, if we subtract 120% - 100%, it's gonna result in a difference of 20%, which means that 12 represents a 20% more, or his collection increased in a 20%.

7 0

3 years ago

3. Andrew wants to buy exercise equipment that costs $140 and the

sertanlavr [38]

Answer:

23

Step-by-step explanation:

just trust me

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3 years ago

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A fluid ounce equals teaspoons. How many teaspoons are in 5 fluid ounces?

Naddika [18.5K]

I think it’s 3 that’s what I got

7 0

3 years ago

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A random variable x takes four possible values, 0, 2, a, and b, where a and b are unknown numbers. if pr[x = 0] = 0.2, pr[x=2] =

Alexus [3.1K]

$\displaystyle\sum_{x\in\{0,2,a,b\}}\mathbb P(X=x)=1$
$\mathbb P(X=0)+\mathbb P(X=2)+\mathbb P(X=a)+\mathbb P(X=b)=1$
$0.2+0.4+0.3+\mathbb P(X=b)=1$
$\implies\mathbb P(X=b)=0.1$

$\mathbb E(X)=\displaystyle\sum_{x\in\{0,2,a,b\}}x\mathbb P(X=x)=2.8$
$0\mathbb P(X=0)+2\mathbb P(X=2)+a\mathbb P(X=a)+b\mathbb P(X=b)=2.8$
$0.8+0.3a+0.1b=2.8$
$0.3a+0.1b=2$

$a+b=6\implies0.3a+0.1b=0.2a+0.1(6)=2$
$0.2a+0.6=2\implies0.2a=1.4\implies a=7$

7 0

3 years ago

Tom has a fair spinner with six sides.

77julia77 [94]

Answer:

likely ❤️❤️❤️❤️❤️❤️❤️

3 0

3 years ago