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Snowcat [4.5K]
3 years ago
7

In a class of 25 students, 15 of them have a cat,

Mathematics
1 answer:
Tju [1.3M]3 years ago
5 0

Answer:

9/25

Step-by-step explanation:

I used to struggle on these too, but I'll exaplain the best I can. Firstly, we know that 3 people don't have a cat or a dog, so what we do is we minus that from 25. This becomes 22. Now, we have to add the amount of people who have a cat to the amount of people who have a dog, and then minus it from 22, because that is the amount of people without double ups in the class with at least either one of the pets given. So, 16+15=31. Now, we do 31-22, which is equal to 9. Therefore, 9/25 people, (because the question asked out of random in the class), have a cat and a dog. This is because the double up are the extra amount of people who had more than one pet. Hopefully this was helpful. I'm sorry if it is not as probability is a hard topic to explain.

:))))))))))))))))))))))))))

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What is the mode of this data?<br> 1.7 8.9 3 5.9 3.2 4.1 6.6 0.7
ExtremeBDS [4]

Answer:

The value of Mode is 2.43

Step-by-step explanation:

  • To find the mode of the given data first we have to arrange it in a increasing order then find out mean and median of the given data
  • 0.7,1.7,3,3.2,4.1,5.9,6.6,8.9 is in increasing order
  • For finding the median we need to take the average of 4th and 5th terms because we have the no of terms in the sequence is even not odd so we need to take the average the 4th term=3.2 and the 5th term =4.1
  • so average =(3.2+4.1)/2=3.65
  • so the median is equal to 3.65
  • For mean we have to take the average of the data
  • so mean= sum of all data /no of data
  • mean =(0.7+1.7+3+3.2+4.1+5.9+6.6+8.9)/8=4.26
  • so by using the formula we can get mode
  • <em>Mode=3×Median-2×Mean</em>
  • Mode=3×3.65-2×4.26=2.43
  • ∴The value of Mode is given as 2.43
5 0
4 years ago
Complete the solution of the equation. find the value of y when x equals 9. 3x + 4y = 43
Marizza181 [45]
Y = 4

3x + 4x = 43

3(9) + 4x = 43

27 + 4x = 43

4x = 43-27

4x = 16

16/4 = x

4=x

x=4
7 0
3 years ago
Find the distance between the two points~<br>A ( 7 , 4 ) and B ( 3 , 2 )<br><br><br>thankyou!​
vodka [1.7K]

Answer:

AB = \sqrt{20}

Step-by-step explanation:

calculate the distance using the distance formula

d = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

with (x₁, y₁ ) = B (3, 2 ) and (x₂, y₂ ) = A (7, 4 )

AB = \sqrt{(7-3)^2+(4-2)^2}

     = \sqrt{4^2+2^2}

     = \sqrt{16+4}

     = \sqrt{20}

     ≈ 4.47 ( to 2 dec. places )

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2 years ago
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lilavasa [31]

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

                  Hello!

✧・゚: *✧・゚:*    *:・゚✧*:・゚✧

❖ 20% as as a fraction in lowest terms is \frac{1}{5}

Percents are out of 100% so write 20% out of 100% as a fraction:

\frac{20}{100}

Both the numerator and denominator can be divided by 20 so once divided, you get \frac{1}{5}

~ ʜᴏᴘᴇ ᴛʜɪꜱ ʜᴇʟᴘꜱ! :) ♡

~ ᴄʟᴏᴜᴛᴀɴꜱᴡᴇʀꜱ

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