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3 years ago

What makes a sample random

Mathematics

2 answers:

Yuliya22 [10]3 years ago

7 0

Answer:

A simple random sample is a subset of a statistical population in which each member of the subset has an equal probability of being chosen. ... An example of a simple random sample would be the names of 25 employees being chosen out of a hat from a company of 250 employees

Step-by-step explanation:

i searched it up

Misha Larkins [42]3 years ago

4 0

Answer: A random sample is a sample that is chosen randomly.

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A bottle contains 255 coins. 1/3 of the coins are ?1.00. 110 of the coins are 50p coins. the rest are 20p coins. work out the to

aliina [53]

Answer:

£152.

Step-by-step explanation:

We have been given that a bottle contains 255 coins. 1/3 of the coins are £1.00.

Let us find 1/3 of 255 to find the number of £1 coins.

$\£1\text{ coins}=\frac{1}{3}\times 255$

$\£1\text{ coins}=85$

This means we have £85.

We are also told that 110 of the coins are 50 p coins.

$\text{Value of 50 p coins}=\£0.50\times 110$

$\text{Value of 50 p coins}=\£55$

Let us figure out number of 20 p coins by subtracting the number of £1 coins and 50 p coins from 255.

$\text{Number of 20 p coins}=255-(85+110)$

$\text{Number of 20 p coins}=255-(195)$

$\text{Number of 20 p coins}=60$

$\text{Value of 20 p coins}=\£0.20\times 60$

$\text{Value of 20 p coins}=\£12$

Now let us find total value of the coins contained in the bottle by adding the values of £1 coins, 50 p coins and 20 p coins.

$\text{The total value of the coins}=\£85+\£55+\£12$

$\text{The total value of the coins}=\£152$

Therefore, the total value of the coins contained in the bottle is £152.

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3 years ago

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The table below shows the ages of 50 people on a bus.

emmasim [6.3K]

Step-by-step explanation:

The table is missing pls attach table so that I can answer your question thank you so much for cooperating with me

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2 years ago

A triangle has sides with lengths of 18 centimeters, 68 centimeters and 74 centimeters. Is it a right triangle?

Hoochie [10]

18^2 + 68^2 =

= 324 + 4,624

= 4,948

74^2 = 5,476

4,848 is not equal to 5,476.

Since the sum of the squares of the lengths of the two shorter sides is not equal to the square of the length of the longest side, the triangle is not a right triangle.

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3 years ago

54 is the sum of 11 and raj's score

Leviafan [203]

Answer:

54 is the sum of 11 and Raj's age. Use variable "r" to represent Raj's age

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3 years ago

Hey, Marina! Here's the question. What is (10*50)/100?

Mrrafil [7]

(10 * 50) / 100
Multiply 10 and 50
500/100
500 divide by 100

The answer is 5

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3 years ago

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