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qwelly [4]
3 years ago
14

Find the probability of selecting two number cards when two cards are

Mathematics
2 answers:
QveST [7]3 years ago
8 0

We know that there are 36 number cards and 16 face cards in standard deck of 52 cards. Now choose two cards without replacement from 52 cards.

The number of ways of choosing any 2 cards without replacement from 52 cards is

C(2,52)=\frac{52!}{50!2!}  .

The number of ways of choosing 2 number cards without replacement from 36 cards is

C(2,36)=\frac{36!}{34!2!}  .

The required probability is

\frac{\frac{36!}{34!2!}}{\frac{52!}{50!2!}  } =\frac{35*36}{51*52} =\frac{105}{221}  

Correct choice is (A)

olga2289 [7]3 years ago
6 0

We know that there are 36 number cards and 16 face cards in standard deck of 52 cards. Now choose two cards without replacement from 52 cards.

The number of ways of choosing any 2 cards without replacement from 52 cards is

C(2,52)=\frac{52!}{50!2!}.

The number of ways of choosing 2 number cards without replacement from 36 cards is

C(2,36)=\frac{36!}{34!2!}.

The required probability is

\frac{\frac{36!}{34!2!}}{\frac{52!}{50!2!}  } =\frac{35*36}{51*52} =\frac{105}{221}

Correct choice is (A).

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4 0
2 years ago
Express each of the following decimals as a percentage<br> 1.35<br> solution for class 7
Semmy [17]

Answer:

135%

Step-by-step explanation:

To represent a decimal to percentage, multiply by 100

1.35 x 100 = 135

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6 0
2 years ago
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What number "c" completes the square: x^2 - 14x + c
Vladimir79 [104]

Answer:

49

Step-by-step explanation:

To complete the square we use the formula:

c=(\frac{b}{2} )^{2}

So we can plug in 14 for b to find c.

c=(\frac{14}{2} )^{2}\\\\c=(7 )^{2}\\c=49

Now this equation can be factored into:

(x-7)^{2}

6 0
3 years ago
Find the value of x given the diagram below
Pie

The value of x is 44°.

Step-by-step explanation:

Step 1:

The sum of the angles in a triangle is equal to 180°.

The sum of the angles along a straight line is 180°.

The two given angles of the triangle are 14° and 30°.

Assume the third angle is a.

The sum of 14°, 30° and a is 180°.

14+30+a=180.

a = 180-44 = 136.

So the third angle of the triangle is 136°.

Step 2:

The sum of the angles along a straight line is 180°.

The sum of the angle of the triangle, 136° and x is 180°.

136+x=180.

x = 180- 136 = 44.

So x measures 44°.

3 0
3 years ago
Shen paid $14.98 for a 7.26 KG bag of dog food. A few weeks later he paid $17.54 or 7.94 kg bag. Find the unit price for each
bagirrra123 [75]

Answer:

1. Shen payed around $2.06 for the first bag of dog food.

2. Shen payed around $2.21 for the second bag of dog food.

Step-by-step explanation:

First, you have to do 14.98/7.26 to get around 2.06

Then, you do 17.54/7.94 to get around 2.21

Hope this helps!

7 0
3 years ago
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