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salantis [7]
3 years ago
11

P(King or black card)?

Mathematics
1 answer:
Pavlova-9 [17]3 years ago
4 0

Answer:

7/13

Step-by-step explanation:

If we are looking at a standard deck of playing cards, we have 52 cards total.

*13 of each suit (there are 4 suits; spades, clubs, hearts, and diamonds)

*2 kinds of colors-black or red. Half the deck is black and half the deck is red. There are 26 reds and 26 blacks.

*There is 1 king of each suit and since there are 4 suits, then there are 4 kings.

We can make other observations.

P(King or black card)

=P(King)+P(black card)-P(king and black card)

(We are subtracting out anything that counted twice in the "and" part)

=4/52 +   26/52         -    2/52

Notes:

-P(king)=4/52 comes from there being 4 kings in all in a deck of 52 playing cards.

-P(black card)=26/52 comes from that half the deck is black (and the other half is red) in a deck of 52 playing cards. Technically, we could have just said this equal 1/2 here instead. I will leave as 26/52 for now so I can have a common denominator already setup.

-P(king and black card)=2/52 comes from there being 2 black cards that are kings in a deck of 52 playing cards.  We have to get rid of these 2 from the 4+26 since if we don't we would have counted them twice)

Let's simplify:

=(4+26-2)/52

=(30-2)/52

=28/52

Let's reduce:

=(28/4)/(52/4)

=7/13

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irina1246 [14]

Given:

The graph of a radical function.

To find:

The domain of the given radical function.

Solution:

We know that, domain is the set of input values or we can say domain is the set of x-values for which the function is defined.

From the given graph it is clear that, for each value of x there is a y-value. It means the function is defined for all real values of x. So,

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8 0
2 years ago
A plane ticket barcelona costs £175 the price decreases by 6% work out the new price
Bond [772]

Answer: £164.50

175 decreased by 6% = 164.5

Absolute change (actual difference):

164.5 - 175 = - 10.5

Step-by-step explanation:

175 - Percentage decrease =

175 - (6% × 175) =

175 - 6% × 175 =

(1 - 6%) × 175 =

(100% - 6%) × 175 =

94% × 175 =

94 ÷ 100 × 175 =

94 × 175 ÷ 100 =

16,450 ÷ 100 =

164.5

£164.50

6 0
3 years ago
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Marcus has 731 books he puts about the same number of books on each of nine shelves in his bookcase about how many books are on
kondaur [170]

Answer:

81.2222 or 81 with 2 left over

Step-by-step explanation:

731/9 = 81.2222

81.2222 rounded down = 81

9*81 = 729

731-729 = 2 left over

This is the third time I am answering the question.

5 0
3 years ago
What are the possible steps involved in solving the equation shown? Select three options. 3.5 + 1.2(6.3 – 7x) = 9.38 Add 3.5 and
motikmotik

Answer:

1) Distribute 1.2 to 6.3 and -7x

2)Combine 3.5 and 7.56

3)Subtract 11.06 from both sides

Step-by-step explanation:

3.5 + 1.2(6.3 - 7x) = 9.38

Distribute 1.2 to 6.3 and -7x

3.5 + 1.2* 6.3 - 1.2 * 7x = 9.38

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Combine 3.5 and 7.56

11.06 - 8.4x = 9.38

Subtract 11.06 from both sides

11.06 - 8.4x -11.06 = 9.38 - 11.06

                    -8.4x = -1.68

To find solution:

Divide both sides by (-8.4)

-8.4x/-8.4 = -1.68/-8.4

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Your answer would be 24/25

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