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3 years ago

There are 45 people on the bus. 60% of them were adults. How many adults were on the bus? Write an explanation

Mathematics

2 answers:

julia-pushkina [17]3 years ago

8 0

Answer: there are 18 adults on the bus

Step-by-step explanation:

Alla [95]3 years ago

5 0

Answer: i

Step-by-step explanation:

45 into a percent

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Assume the sample below is a perfectly random sample of students at a school. How much greater is the mean of the

igor_vitrenko [27]

Answer:

0.75

Step-by-step explanation:

The table is not well presented (See Attachment)

There are at least two approaches to this question

Method 1:

Steps

1. Calculate the mean of reported heights

Mean of reported heights = (61+68+57.5+48.5+75+65+80+68+69+63)/10

Mean of reported heights = 655/10

Mean of reported heights = 65.5

2. Calculate the mean of measured heights

Mean of measured heights = (62 + 68 + 56.5 + 47 + 72 + 65 + 78 + 67 + 69.5 + 62.5)/10

Mean of measured heights = 647.5/10

Mean of measured heights = 64.75

3. Get their difference

Difference = Mean of reported heights - Mean of measured heights

Difference = 65.5 - 64.75

Difference = 0,75

Method 2: Calculate the mean of their difference

Mean of difference = Sum of difference / Number of observations

Mean of difference = (-1 + 0 + 1 + 1.5 + 3 + 0 + 2 + 1 – 0.5 + 0.5)/10

Mean of difference = 7.5/10

Mean of difference = 0.75

Note that in both cases, the result is 0,75.

Hence, the reported heights at the school is 0.75 greater than the actual measured height

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3 years ago

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Hi can you help me in mate plis simplify the following algebraic expressions

mars1129 [50]

Answer:

$\frac{3 {x}^{2} }{ {y}^{2} {z}^{6} }$

Step-by-step explanation:

I have attached the explanation above. hopefully this will help

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3 years ago

Parker rolled a number cube 50 times the three appeared 12 times what is the experimental probability of rolling a 3

horsena [70]

12/50 is the probability of rolling a 3
12/50= He has a 24% chance of rolling a three

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3 years ago

What is 28 % as a fraction?

Aleksandr [31]

28/100 And that can be simplified 14/50 to 7/25 So 7/25 is the most simplified version

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3 years ago

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Roman is considering buying shares of GHI stock. The stock currently sells for $60 per share. The stock changes in value at 8:00

Fynjy0 [20]

Answer:

The Probability that the GHI is less than $70 in three days is 1% or 0.01

Step-by-step explanation:

Here, we want to find the probability that the GHI is less than $70.

So what we do here is to find the scenarios that could make the $60 less than $70 is three days;

Scenario 1;

Two days decrease and one day increase

That will bring the value to 60 -1-1 + 10 = $68 which is less than 70

Scenario 2;

Three days decrease

That will bring the value to

60-1-1-1 = 57 which is less than 70

Any other possible scenario to make the value of the share less than 70? NO !

For the 1st case scenario;

Two days decrease and one day increase;

The scheduled probabilities will be as follows;

Kindly recall, probability of increase = 90% = 90/100 = 0.9

Probability of decrease = 10% = 10/100 = 0.1

So probability in scenario 1 will be;

P(Two days decrease and one day increase)

= 0.1 * 0.1 * 0.9 = 0.009

Kindly note this can happen in any order and since no order was specified, we do not need to consider other cases

Scenario ii

Three days decrease

That will be;

P(three days decrease) = 0.1 * 0.1 * 0.1 = 0.001

So the addition of both since we will be having either of the two and or means addition in probability will be ;

0.001 + 0.009 = 0.01 = 1%

4 0

3 years ago