If the ratio of boys to girls at the school is 2:5 and there are 40 boys how many girls are there?
Answers
The total number of students in school is 140 and number of girls at the school is equal to 100.
What do you mean by ratio ?
Ratio is the quantitative relationship between two values indicating how frequently one value contains or is contained within the other.
It is given that the ratio of boys to girls at the school is 2:5.
Let's assume the total number of students in school is x.
We now need to find the number of girls in the school but before that we must try to find the total number of students in the school.
Sum of ratios = 2 + 5 = 7
It is given that there are 40 boys in students.
2/7 of the total number of students are boys.
i.e., the expression can be written as :
2x / 7 = 40
2x = 40 × 7
2x = 280
x = 140
The total number of students in school is 140.
So , the number of girls in school is :
= 140 - 40
= 100
There are 100 girls in the school.
Therefore , the total number of students in school is 140 and number of girls at the school is equal to 100.
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Answer:
100 girls
Step-by-step explanation:
The ratio of boys : girls is 2 : 5.
In other words, boys are 2 parts of the school while girls are 5 parts of the school.
Since there are 40 boys, 2 parts of the school is 40. Thus:
1 part is 20.
Since there are 5 parts girls, there are
100 girls.
Answer: 100 girls
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Answer:
1 ft^2
Step-by-step explanation:
We know 12 inches = 1 ft
12 inches by 12 inches
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Answer:
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Answers
The fraction is defined as a number in the form of a/b where a nd b are integers and b is not equal to zero. Sarah has left with 120 balloons.
What is a Fraction?
A fraction is used to represent a portion or part of anything. It consists of two parts a numerator and a denominator. For example 1/4 is a fraction where numerator is 1 and denominator is 4.
The total number of packages = 8
Number of balloons in each package = 20.
The portion of balloons use to decorate hall = 1/4.
Suppose the remaining balloons are x.
Thus the expression for remaining balloons can be written as,
x = 20 × 8 - 1/4×(20 × 8)
x = 160 - 40
= 120.
Hence, Sarah has left with 120 balloons and the expression for left balloons is x = 20 × 8 - 1/4×(20 × 8).
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Answer:
(8 × 20) ÷ 4
40
Step-by-step explanation:
8 × 20 = 160
160/4 = 40
buckets, how much will be in each bucket?
Answers
Answers
Answer:
a. 248.14
b. 220.576
Step-by-step explanation:
The weighted mean can be calculated as
Xbarw= sumwx/sumw
where x are the observations and w are the weights of the observations.
a.
x w wx
248.13 3 744.39
248.06 1 248.06
248.18 2 496.36
248.15 3 744.45
sumwx=744.39+248.06+496.36+744.45=2233.26
sumw=3+1+2+3=9
Xbarw= sumwx/sumw
Xbarw= 2233.26/9
Xbarw= 248.14
The weighted mean for line BC is 248.14.
b.
x w wx
248.13 1 248.13
248.06 1 248.06
248.18 3 744.54
248.15 3 744.45
sumwx=248.13+248.06+744.54+744.45=1985.18
sumw=3+1+2+3=9
Xbarw= sumwx/sumw
Xbarw= 1985.18/9
Xbarw= 220.576
The weighted mean for line BC is 220.576.
Final answer:
The weighted mean of line BC for the first given weights is 248.13. The weighted mean for the revised weights is 248.14.
Explanation:
The weighted mean of a set of values is calculated by multiplying each value by its weight, summing those products, and then dividing the sum by the total of the weights. So we will first multiply each distance by its corresponding weight then add them all up and divide it by the sum of weights. Let's calculate.
- For the first case, the weights given are 3, 1, 2, and 3. The weighted mean of BC can be computed as ((248.13*3)+(248.06*1)+(248.18*2)+(248.15*3)) / (3+1+2+3), which equals 248.13.
- For the second case, the weights are revised as 1, 1, 3, and 3. The weighted mean of BC in this case is ((248.13*1)+(248.06*1)+(248.18*3)+(248.15*3)) / (1+1+3+3), which gives 248.14.
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Answers
Answer:
1:4
Step-by-step explanation:
1.2 cm of white fabric per 48 mm of colored fabric:
1.2 cm : 48 mm= 12 mm: 48 mm= 1:4
The ratio is: 1:4
It is a 4 : 1 ratio of color to white
or a 1 : 4 white to colored
Explanation:
1cm = 10mm
1.2cm = 12mm
12 : 48 --> 1 : 4
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Answer: (4,5,7) ,(7.2,-4),(-4,-7.2),(3,5.2)
Step-by-step explanation:
Answer:
it's C
Step-by-step explanation: