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2 years ago

Please help me with this question.

Mathematics

1 answer:

krek1111 [17]2 years ago

7 0

Answer:

Step-by-step explanation:

736

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An urn contains 5 red balls and 2 green balls. Two balls are drawn one after the other. What is the probability that the second

AleksAgata [21]

Answer:

<em>The probability that the second ball is red is 71%</em>

Step-by-step explanation:

<u>Probabilities</u>

We know there are 5 red balls and 2 green balls. Let's analyze what can happen when two balls are drawn in sequence (no reposition).

The first ball can be red (R) or green (G). The probability that it's red is computed by

$\displaystyle P(R)=\frac{5}{7}$

The probability is's green is computed by

$\displaystyle P(G)=\frac{2}{7}$

If we have drawn a red ball, there are only 4 of them out of 6 in the urn, so the probability to draw a second red ball is

$\displaystyle P(RR)=\frac{5}{7}\cdot \frac{4}{6}=\frac{10}{21}$

If we have drawn a green ball, there are still 5 red balls out of 6 in the urn, so the probability to draw a red ball now is

$\displaystyle P(GR)=\frac{2}{7}\cdot \frac{5}{6}=\frac{5}{21}$

The total probability of the second ball being red is

$\displaystyle P(XR)=\frac{10}{21}+\frac{5}{21}=\frac{5}{7}=0.71$

The probability that the second ball is red is 71%

7 0

2 years ago

What’s the probability?

son4ous [18]

Answer:

$\frac{1}{8}$

Step-by-step explanation:

The probability for a flip on either side of the coin is always 50% or $\frac{1}{2}$

So to get the probability for the three flips just do:

$(\frac{1}{2}) ^{3}$ or $\frac{1}{2}$ × $\frac{1}{2}$ × $\frac{1}{2}$

Either way you solve it the answer is $\frac{1}{8}$

6 0

2 years ago

What is the measure of XY

Nana76 [90]

Answer:

no clueeeereereee

Step-by-step explanation:

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5 0

2 years ago

Round 637.892 to the nearest whole number

ladessa [460]

The next larger whole number is 638 .
The next smaller whole number is 637 .

637.892 is closer to 638 than it is to 637 .

The nearest whole number is 638 .

3 0

3 years ago

Read 2 more answers

4 (5x-3) -64 (3-x) -3 (12x-4)=96

Yuki888 [10]

Are you trying to simply the equation if so x = 6

4 0

2 years ago

Please help me with this question. ​

Please help me with this question.