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3 years ago

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There is a bag filled with 3 blue and 4 red marbles. A marble is taken at random from the bag, the colour is noted and then it i

s not replaced. Another marble is taken at random. What is the probability of getting exactly 1 red? its not 4/6 btw

1 answer:

oksano4ka [1.4K]3 years ago

8 0

Answer:

Step-by-step explanation:

You might be interested in

a committee has eleven members. there are 3 members that currently serve as the boards chairman, ranking members, and treasurer.

miss Akunina [59]

Answer:

$\frac{1}{990}$

Step-by-step explanation:

<u>The full question:</u>

<em>"A committee has eleven members. there are 3 members that currently serve as the boards chairman, ranking members, and treasurer. each member is equally likely to serve in any of the positions. Three members are randomly selected and assigned to be the new chairman, ranking member, and treasurer. What is the probability of randomly selecting the three members who currently hold the positions of chairman, ranking member, and treasurer and reassigning them to their current positions?"</em>

<em />

<em />

The permutation of choosing 3 members from a group of 11 would be:

P(n,r) = $\frac{n!}{(n-r)!}$

Where n would be the total [in this case n is 11] & r would be 3

Which is:

P(11,3) = $\frac{11!}{(11-3)!}=\frac{11!}{8!}=11*10*9=990$

So there are total of 990 possible way and there is ONLY ONE WAY for them to be reassigned. Hence the probability would be:

1/990

8 0

3 years ago

Solve for the portion. Round to hundredths when necessary.<br> What number is 0.4% of 500?

Yuri [45]

Answer:

2

Step-by-step explanation:

0.4%×500=2

Hope it helps!!!

4 0

2 years ago

Sarah is making her own costume for her role in the school play. The costume requires 25/8 yards of material. Select the number

BARSIC [14]

Answer:

Step-by-step explanation:

25/8

8*3=24

25-24=1

3 1/8

8 0

3 years ago

What percent of $200 is $40?

forsale [732]

To find the answer to the question we do the equation $40/200*100$

Which gets us our answer of 20%

4 0

3 years ago

Read 2 more answers

A scientist is growing bacteria in a lab for study. One particular type of bacteria grows at a rate of y=2t^2+3t+500. A differen

Leya [2.2K]

ANSWER

Approximately after 15 minutes.

EXPLANATION

The growth rate of the first bacteria is

$y = 2 {t}^{2} + 3t + 500$

The growth rate of the first bacteria :

$y = 3 {t}^{2} + t + 300$

To find the time that, there will be an equal number of bacteria, we equate the two equation;

$3 {t}^{2} + t + 300 = 2 {t}^{2} + 3t + 500$

$3 {t}^{2} - 2 {t}^{2} + t - 3t + 300 - 500 =00$

${t}^{2} - 2t - 200= 0$

We solve for t to get,

$t = 15.177$

Or

$t = - 13.177$

We discard the negative value.

This implies that,

$t \approx15$

8 0

3 years ago