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Wewaii [24]
2 years ago
8

A card was selected at random from a standard deck of cards. The suit of the card was recorded, and then the card was put back i

n the deck. The table shows the results after 40 trials. What is the relative frequency of selecting a diamond?.
Mathematics
1 answer:
cupoosta [38]2 years ago
5 0

The relative frequency of selecting a diamond from 40 trials of selecting a random card is 30%.

<h3>What is relative frequency?</h3>

The relative frequency of an event is the ratio of total number of favorable or desired outcome to the total number of trails done.

Given information-

The card is selected random from the deck of cards.

Total number of trails is 40.

It is known that the total number of diamond card in a standard deck of card is 11. There is total 40 trials is done in which a random card is selected.

As the relative frequency is the ratio of total number of diamonds to the total number of trials done. Thus,

f_r=\dfrac{11}{40}\\f_r=0.3

In the percentage from,

f_r={0.3}\times100\\f_r=30

Thus the relative frequency of selecting a diamond from 40 trials of selecting a random card is 30%.

Learn more about the relative frequency here;

brainly.com/question/26177128

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Collection of_______ is called Statistics.
siniylev [52]

Answer:

Collection of numerical information is called Statistics

Step-by-step explanation:

From the Oxford dictionary, the definition of statistics (science) is: "the practice or science of collecting and analyzing numerical data in large quantities, especially to infer proportions in a whole from those in a representative sample".

While the definition of statistic (data) is: "a fact or piece of data obtained from a study of a large quantity of numerical data".

Statistics is a science, not a method, therefore answer can´t be a).

Not all sample data is necessarily a statistic, therefore answer can´t be b).

All statistics are numerical information.

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Cleaned data is information filtered with a specific criterion, but not necessarily used in a statistic.

The most probable answer is c.

5 0
3 years ago
a train travelling at 60 km per hour takes 18 second to cross a 180 metre long platform find the length of the train​
uranmaximum [27]
Lengthof train=X
platform length=180
total distance=x+180
speed=60km/hr=60×5/18=(300/18)m/
Time =18s
Time =Distance/speed
18=X+180/(300/18
18×300=18(X+180)
300=X+180
x=300-180=120
so length of the train=120m
6 0
3 years ago
The radius of a sphere with a surface area of 36pi square meters
Marysya12 [62]

Answer:

Step-by-step explanation:

surface area=4πr²=36π

r²=9

r=3

5 0
3 years ago
A triangle has an area of 24 square units. Its height is 6 units.
devlian [24]
Area of triangle=1/2 times base times  height
given that area=24 and height=6
24=1/2 times base times 6
24=1/2 times 6 times base
24=3 times base
divide both sides by 3
8=base
the base is 8 units long
4 0
3 years ago
Read 2 more answers
I’m confused on this one
nikklg [1K]

2·(2 + 9 + 2/SIN(30°)) = 30

6 0
3 years ago
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