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gayaneshka [121]
3 years ago
10

A gambler in Las Vegas is cutting a deck of cards for $1,000. What is the probability that the card for the gambler will be the

following?a. A face cardb. A queenc. A spaded. A jack of spades
Mathematics
1 answer:
White raven [17]3 years ago
5 0

Answer:

a. 3/13 or 23.08%

b. 1/13 or 7.69%

c. 1/4 or 25.00%

d. 1/52 or 1.92%

Step-by-step explanation:

Number of cards in a deck = 52

a. A face card

Considering there are four suits and each suit has three different face cards, the probability that the card is a cafe card is:

P_{F} =\frac{3*4}{52}\\ P_{F} =\frac{3}{13}

b. A queen

There are 4 queens in the deck, on of each suit, thus the probability of getting a queen is:

P_{Q} =\frac{4}{52}\\ P_{Q} =\frac{1}{13}

c. A spade

There are four suits with the same number of cards in a deck, therefore, the probability of getting a spade is:

P_{S} =\frac{1}{4}

d. A jack of spades

Since there are no repeated cards, there is only one jack of spades in a 52 cards deck:

P_{J+S} =\frac{1}{52}

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Find (a) the number of subsets and (b) the number of proper subsets of the set.
vaieri [72.5K]

Answer:

(a) Total No. of Subsets = 128

(b) Total No. of Proper Subsets = 127

Step-by-step explanation:

First we need to define the set of days of the week.

Set of Days of Week = {Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday}

It is evident from the set of days of the week, that it contains 7 elements.

(a)

The total no. of subsets of a given set is given by the following formula:

Total No. of Subsets = 2^n

where,

n = no. of elements of the set = 7

Therefore,

Total No. of Subsets = 2^n

Total No. of Subsets = 2^7

<u>Total No. of Subsets = 128</u>

(b)

The total no. of proper subsets of a given set is given by the following formula:

Total No. of Proper Subsets = (2^n) - 1

where,

n = no. of elements of the set = 7

Therefore,

Total No. of Proper Subsets = (2^n) - 1

Total No. of Proper Subsets = (2^7) - 1 = 128 - 1

<u>Total No. of Proper Subsets = 127 </u>

3 0
3 years ago
PLZ HLP! on a timed assingmnent. A rectangular shaped desk has a length of 25 inches and a width of 18 inches. A desk with a sim
spin [16.1K]

Answer:

I think the width would be 7.5

Step-by-step explanation:

25 x 18 = 450

450/60 = 7.5

Therefore the width is 7.5

Sorry if wrong hope this helped and pls mark brainliest!

6 0
3 years ago
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dezoksy [38]

Idk if this will help, but her :)

8 0
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The values (11.1, 4) and (x, 15) are from an inverse variation. Find the missing value and round to the nearest
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3 years ago
Annie walks 15 feet away from her house and places a mirror on the ground. She backs 4 feet away from the mirror so that she can
artcher [175]

Answer:

The house is 18.75 feet tall

Step-by-step explanation:

The triangles are similar by the AA postulate.  

We are given the length of the bottom sides of the triangles, 4 and 15 respectively.  

Thus, the ratio is 4:15

We are also given the height of Annie's eyes, which is 5 feet. The height of the side that corresponds to the house is 5, so we can set up a proportion.

\frac{4}{15}  = \frac{5}{x} \\4x = (5*15) = 75\\x = \frac{74}{4} \\x = 18.75

Thus, the house is 18.75 feet tall.

5 0
3 years ago
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