1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
elena-s [515]
3 years ago
12

What is the probability of drawing 2 cards in succession (without replacement) from a standard deck and having them both be face

cards?
Mathematics
1 answer:
Lesechka [4]3 years ago
4 0

Answer:      \dfrac{11}{221}

Step-by-step explanation:

We know that the total number of cards in a standard deck = 52

Then the number of ways to draw any two card = 52 x (52-1)

= 52 x 51 = 2652   [By Multiplicative principle]

Also , there are 12 face cards in a standard deck , so the number of ways to draw two face cards in succession = 12 x (12-1)

12 x 11= 132   [By Multiplicative principle]

Then, the probability of drawing 2 cards in succession (without replacement) from a standard deck and having them both be face cards would be

\dfrac{\text{ Number of ways to draw 2 face cards}}{\text{Total number of ways to draw two cards}}

=\dfrac{132}{2652}=\dfrac{11}{221}

Hence, the required probability is  \dfrac{11}{221} .

You might be interested in
Hang 7 pictures with grandfather in the middle how many ways
PSYCHO15rus [73]
Two at the top (side by side)
Two at the bottom ☝
One on right side
One on left side
And grandfather in the middle
7 0
3 years ago
XY is a diameter of a circle and Z is a point on the circle such that ZY=6. If the area of the triangle XYZ is 18 square root 3
nataly862011 [7]
<h2>Answer:</h2>

4π

<h2>Step-by-step explanation:</h2>

As shown in the diagram, triangle XYZ is a right triangle. Therefore, its area (A) is given by:

A = \frac{1}{2} x b x h      -------------(i)

Where;

A = 18\sqrt{3}

b = XZ = base of the triangle

h = YZ = height of the triangle = 6

<em>Substitute these values into equation(i) and solve as follows:</em>

18\sqrt{3} =  \frac{1}{2} x b x 6

18\sqrt{3} =  3b

<em>Divide through by 3</em>

6\sqrt{3} =  b

Therefore, b = XZ = 6\sqrt{3}

<em>Now, assume that the circle is centered at O;</em>

Triangle XOZ is isosceles, therefore the following are true;

(i) |OZ| = |OX|

(ii) XZO = ZXO = 30°

(iii) XOZ + XZO + ZXO = 180°   [sum of angles in a triangle]

=>  XOZ + 30° + 30° = 180°

=>  XOZ + 60° = 180°

=>  XOZ = 180° - 60°

=>  XOZ = 120°

Therefore we can calculate the radius |OZ| of the circle using sine rule as follows;

\frac{sin|XOZ|}{XZ} = \frac{sin|ZXO|}{OZ}

\frac{sin120}{6\sqrt{3} } = \frac{sin 30}{OZ}

\frac{\sqrt{3} /2}{6\sqrt{3} } = \frac{1/2}{|OZ|}

\frac{1}{12}  = \frac{1}{2|OZ|}

\frac{1}{6} = \frac{1}{|OZ|}

|OZ| = 6

The radius of the circle is therefore 6.

<em>Now, let's calculate the length of the arc XZ</em>

The length(L) of an arc is given by;

L = θ / 360 x 2 π r          ------------------(ii)

Where;

θ = angle subtended by the arc at the center.

r = radius of the circle.

In our case,

θ = ZOX = 120°

r = |OZ| = 6

Substitute these values into equation (ii) as follows;

L = 120/360 x 2π x 6

L = 4π

Therefore the length of the arc XZ is 4π

5 0
3 years ago
eight more than the product of four and a number is equivalent to seven less than the same number in equation form.
Georgia [21]
4n + 8 = n - 7
(In which 'n' represents the unknown number)

(4n + 8): "Eight more than the product of four and a number"

(= n - 7): "Is equivalent to seven less than the same number in equation form."

Subtract 8 from both sides:
4n = n - 15

Subtract n from both sides:
3n = -15

Divide both sides by 3:
n = -5
5 0
3 years ago
Find the selling price $280 tax 5%
Semenov [28]

Answer:

The selling price is $294

Step-by-step explanation:

5/100 (280)

0.05 * 280 = 14

5% of 280 equals 14.

To find the selling price we have to add the tax to the price.

$14 + $280 = $294

<em>The selling price is $294</em>

6 0
3 years ago
I REALLY NEED SOME HELP! THANK YOU SO MUCH!
Katyanochek1 [597]
I thinkkk it’s both so C
4 0
3 years ago
Other questions:
  • you and your friend share a package of candies. You eat twice as many candies as your friend. If there were 36 candies in the ba
    5·1 answer
  • Solve 3 x 40 draw a model to show your answer
    5·1 answer
  • 1898, L. J. Bortkiewicz published a book entitled The Law of Small Numbers. He used data collected over 20 years to show that th
    9·1 answer
  • PLS ANSWER I WILL MARK AS BRAINLIEST PLS
    6·2 answers
  • Solve the system of equations.<br><br><br> −5x+2y=9<br> y=7x<br> ​
    5·2 answers
  • Y= -7 and -4 + 2y = -2
    10·1 answer
  • I forgot about everything last year
    15·1 answer
  • Noah makes acai bowl using 1/4 cup of bananas for every 1/3 cup of apple juice. He wants to know the number of cups of bananas p
    9·2 answers
  • Find the missing lengths. If needed, give the answer in simplest radical form.
    5·1 answer
  • Calculating the relative frequencies from the data given in the table. Choose all that correctly describe an association between
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!