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3 years ago

A number is chosen at random from the first 100 positive integers. Find the probability that the number is divisible by 5. 1/10

1 answer:

3 0

The number of multiples of 5 from 1 to 100 is:

1≤5n≤100

1/5≤n≤20, since n must be an integer

1≤n≤20

So the multiples of five number 20-1+1=20 elements, and the probability of choosing one of the multiples from the first 100 positive integers is:

P(5n)=20/100=1/5

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A used-droid dealership buys a droid for $2900 and then sells it for $4300. What is the percent increase?

Anna71 [15]

The percent increase is 48.28

Step-by-step explanation:

Given,

Purchase price of used-droid = $2900

Selling price of used=droid = $4300

Profit = Selling price - purchase price

Profit = 4300-2900 = $1400

Percent increase = $\frac{Profit}{Purchase\ price}*100$

$Percent\ increase=\frac{1400}{2900}*100\\\\Percent\ increase=\frac{140000}{2900}\\\\Percent\ increase=48.275\%$

Rounding off to nearest hundredth;

Percent increase = 48.28%

The percent increase is 48.28

Keywords: percentage, subtraction

Learn more about percentages at:

#LearnwithBrainly

8 0

2 years ago

At the first meeting of the Tennis Club, the 7 members decided to have a tournament in which every player will play a match agai

mariarad [96]

Answer:

21 matches

Step-by-step explanation:

This is a combination problem where we have to select two member out of 7 members

So we want calculation of 7C2

7C2 = 7!/[(2!)(7-2)!]

(7*6*5*4*3*2*1)/[(2*1) *(5*4*3*2*1]

(7*6)/2 ~ Note everything that easily cancels here!

42/2

21 matches

5 0

2 years ago

I don't understand how to solve these problems

iragen [17]

When adding fractions you need to get common denominators then you multiply too times bottom and then boom add and there you go

8 0

2 years ago

Read 2 more answers

What is a verbal expression for w-24

schepotkina [342]

Question: What is a verbal expression for w-24

Answer: What is a 24 less than a number <em>w.</em>

Explanation: It would be (What is a 24 less than a number <em>w.</em>), because less than means subtract and you will write it the opposite of how you say it.

Hope It Helps!!

5 0

2 years ago

A biologist tags 25 birds with a band on their foot and lets them go back into the wild. The next year 100 total birds are captu

mestny [16]

Answer:

We can estimate a population of 500 birds.

Step-by-step explanation:

We can estimate the total bird population using a rule of three with the information given:

If we find 5 birds with the foot band among 100 birds captured, how many birds there are in total if inicially we put foot bands in 25 birds?

5 birds with foot band -> 100 birds captured

25 birds with foot band -> X total birds

X * 5 = 25 * 100

X = 25 * 100 / 5 = 500 birds

We can estimate a population of 500 birds.

7 0

2 years ago