Ask question

Ask question

All categories

3 years ago

5

Given a bag of 20 marbles containing 8 green, 4 red, 2 blue, and 6 yellow, of a person picks out a single marble from the bag wi

thout looking, what is the probability that it will be a red marble?

2 answers:

s344n2d4d5 [400]3 years ago

7 0

Answer:

Step-by-step explanation:

P(picking a red marble ) =<u> No. of red marble</u>

Total of marbles

= 4/20 = 1/5

Nesterboy [21]3 years ago

5 0

It’s a 1/5 chance to be red

You might be interested in

3y''-6y'+6y=e*x sexcx

Simora [160]

From the homogeneous part of the ODE, we can get two fundamental solutions. The characteristic equation is

$3r^2-6r+6=0\iff r^2-2r+2=0$

which has roots at $r=1\pm i$ . This admits the two fundamental solutions

$y_1=e^x\cos x$
$y_2=e^x\sin x$

The particular solution is easiest to obtain via variation of parameters. We're looking for a solution of the form

$y_p=u_1y_1+u_2y_2$

where

$u_1=-\displaystyle\frac13\int\frac{y_2e^x\sec x}{W(y_1,y_2)}\,\mathrm dx$
$u_2=\displaystyle\frac13\int\frac{y_1e^x\sec x}{W(y_1,y_2)}\,\mathrm dx$

and $W(y_1,y_2)$ is the Wronskian of the fundamental solutions. We have

$W(e^x\cos x,e^x\sin x)=\begin{vmatrix}e^x\cos x&e^x\sin x\\e^x(\cos x-\sin x)&e^x(\cos x+\sin x)\end{vmatrix}=e^{2x}$

and so

$u_1=-\displaystyle\frac13\int\frac{e^{2x}\sin x\sec x}{e^{2x}}\,\mathrm dx=-\int\tan x\,\mathrm dx$
$u_1=\dfrac13\ln|\cos x|$

$u_2=\displaystyle\frac13\int\frac{e^{2x}\cos x\sec x}{e^{2x}}\,\mathrm dx=\int\mathrm dx$
$u_2=\dfrac13x$

Therefore the particular solution is

$y_p=\dfrac13e^x\cos x\ln|\cos x|+\dfrac13xe^x\sin x$

so that the general solution to the ODE is

$y=C_1e^x\cos x+C_2e^x\sin x+\dfrac13e^x\cos x\ln|\cos x|+\dfrac13xe^x\sin x$

7 0

3 years ago

Marks ratio is 3 tablespoons sugar to 2 tablespoons milk.Sharri is using 4 tablespoons of sugar to 3 tablespoons of milk.Eva is

SpyIntel [72]

Eva because 3:2 = 9:6 because when they multiply by 3 on each ratio

8 0

3 years ago

If m<BDC = 20, m arc AB = 140, and marc CD = 120, find m<1.<br><br>

lara [203]

Answer:

40

ljfldnjkafkjagfbkg bkj hbsfgjhg .

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

Please answer I really need help due at 11:50

klemol [59]

Answer:

|-3| = 3

|3| = 3

Step-by-step explanation:

5 0

2 years ago

Find the measure of

Paladinen [302]

Answer:

16

Step-by-step explanation:

If u use a protracter it will work

5 0

3 years ago