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mrs_skeptik [129]
2 years ago
13

Va box contains 4 red marbles and 7 green remove 3 at once probability of 3 red

Mathematics
1 answer:
lbvjy [14]2 years ago
3 0

Answer:

0.024

Step-by-step explanation:

Given,

Red marbles = 4,

Green marbles = 7,

Total marbles = 4 +7 = 11,

Ways of choosing 3 marbles =^{11}C_3

Ways of choosing 3 red marble = ^4C_3

Hence, the probability of 3 red marble = \frac{^4C_3}{^{11}C_3}

=\frac{\frac{4!}{3!1!}}{\frac{11!}{3!8!}}

=\frac{4}{165}

≈ 0.024

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Rewrite the parametric equations by eliminating the parameter. Select ONE.
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Answer:

Y=(X-7)/2

Step-by-step explanation:

we have

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Y=t-2 -----> t=Y+2 -----> equation B

Substitute equation B in equation A

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solve for Y

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2 years ago
In a recently administered iq test, the scores were distributed normally, with mean 100 and standard deviation 15. what proporti
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To solve for proportion we make use of the z statistic. The procedure is to solve for the value of the z score and then locate for the proportion using the standard distribution tables. The formula for z score is:

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when X = 70

z1 = (70 – 100) / 15 = -2

Using the standard distribution tables, proportion is P1 = 0.0228

 

when X = 130

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P (70<X<130) = P2 – P1

P (70<X<130) = 0.9772 - 0.0228

P (70<X<130) = 0.9544

 

Therefore 0.9544 or 95.44% of the test takers scored between 70 and 130.

6 0
3 years ago
Inga lives 3 miles more than twice as far from school as brent does . If Brent lives (b) miles from school, then inga lives _? m
finlep [7]
Brent lives b miles from the school.
Inga lives 3 miles more then twice as far as Brent.
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Yolanda made 21 hats. Yolanda made 3 times as many hats as Greg. Let n be the number of hats that Greg made.
castortr0y [4]

Answer:

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