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NikAS [45]
3 years ago
12

Mala has a collection of bangles. She has 20 gold bangles and 10 silver bangles. What is the percentage of bangles of each type?

Put it in the tabular form.
Mathematics
1 answer:
Rainbow [258]3 years ago
7 0

Answer:

Percentage of gold bangles is 66.6 and of silver bangles it is 33.3

Step-by-step explanation:

Given:

Number of gold bangles Mala has = 20

Number of silver bangles she has  = 10

Total number of bangles = 20+10 = 30

We have to find the percentage of each type of bangles.

So,

Percentage of bangles  = \frac{No.\ of \ bangles\ each\ type}{Total\ no.\ of \ bangles} \times 100

  • Percentage of gold bangles.

        ⇒ \frac{20}{30} \times 100

        ⇒ \frac{20\times 100}{30}

        ⇒ \frac{2000}{30}

        ⇒ \frac{200}{3}

        ⇒ 66.6\%

  • Percentage of silver bangles.

       ⇒ \frac{10}{30}\times 100

       ⇒ 33.3\%

Percentage of gold bangles, Mala has = 66.6 and of silver bangles it is = 33.3

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The distance between two points on the plane is given by the formula below

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Therefore, in our case,

A=(-1,-3),B=(5,2)

Thus,

\begin{gathered} \Rightarrow d(A,B)=\sqrt[]{(-1-5)^2+(-3-2)^2}=\sqrt[]{6^2+5^2}=\sqrt[]{36+25}=\sqrt[]{61} \\ \Rightarrow d(A,B)=\sqrt[]{61} \end{gathered}

Therefore, the answer is sqrt(61)

In general,

-(-n)=n

Remember that

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1 year ago
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Leya [2.2K]

Answer:

a. The point estimate of the difference between the mean number of miles that Buffalo residents travel per day and the mean number of miles that Boston residentstravel per day is 88

b. The 95% confidence interval for the difference between the two population means is (0.58171,7.21829)

Step-by-step explanation:

a. According to the given data we have the following:

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Standard deviation=8.4

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Boston residents mean=18.6

Standard deviation=7.4

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Hence, the point estimate is the difference of the means=22.5-18.6=3.9

The standard error=√((s1∧2/n1)+((s2∧2/n2))=√((8.4∧2/50)+(7.4∧2/40))=1.67

Therefore, the difference of miles=n1+n2-2=50+40-2=88

The point estimate of the difference between the mean number of miles that Buffalo residents travel per day and the mean number of miles that Boston residentstravel per day is 88.

b. The critical value of t at 95% confidence level and DoF=88 is 1.987

The interval:(x1-x2)+ (critical value* std error)

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Difference between mean=(0.58171,7.21829)

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Answer:

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Step-by-step explanation:

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