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Nikolay [14]
2 years ago
10

A number is selected randomly from the integer from 10to30 what is the probability of picking a multiple of 4or5​

Mathematics
1 answer:
arlik [135]2 years ago
6 0

Answer:

\frac{3}{7}

Step-by-step explanation:

Start by finding how many integers there are from 10-30...

30-10+1=20+1=21

Note we have to add 1 since it is inclusive.

Now, let's find how many multiples of 4 or 5 there are from 10-30...

4*3=12

4*4=16

4*5=20

4*6=24

4*7=28

5*2=10

5*3=15

5*4=20

5*5=25

5*6=30

5+5-1=9

Note we have to subtract 1 since 20 is counted twice.

The probability would be...

\frac{Multiples\ of\ four\ and\ five\ from\ 10-30}{Amount\ of\ integers\ between\ 10-30}=\frac{9}{21}=\frac{3}{7}

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At a sale, dresses were sold for $90 each. This price was 75% of a
gulaghasi [49]

Answer:

A dress originally costs $120

Step-by-step explanation:

To find the original cost of the dress, we will follow the steps below;

let x represent the original cost of the dress

75% of x  = $90

\frac{75}{100}  ×    x   = $90

\frac{75X}{100}  =   $90

MULTIPLY both-side of the equation by 100

\frac{75X}{100} × 100 =   $90×100

At the right-hand side of the equation, 100 will cancel out 100, leaving us with just 75x

75x = $9000

DIVIDE both-side of the equation by 75

75x/75 = $9000/75

At the left-hand side of the equation 75 will cancel-out 75 leaving us with just x

x=  $9000/75

x = $120

A dress originally costs $120

3 0
3 years ago
china receives a shipment of 125 dishes in 5 boxes, at this rate how many dishes will it receive in 15 boxes
Elena-2011 [213]
Simple....

in 5 boxes you have 125 dishes...how many per box?

125/5=25

So, how many dishes in 15 boxes?

25*15=375

This means that in 15 boxes there are 375 dishes.

Thus, your answer.
6 0
3 years ago
Read 2 more answers
What is the probability of picking a blue marble from a bag of 3 blue marbles, 4 orange marbles, 2 yellow marbles and 1 red marb
REY [17]
I thinks it’s 20 because it’s easy
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2 years ago
I need help with this question
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Margaret bought 1,575 grams of rice. how many kg of rice is that?
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? kg = 1575 grams

1.575 kg = 1575 grams

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