English, asked by Anonymous, 2 months ago

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Answers

Answered by goraigopal385
49

ANSWERS:

HELLO FRIENDS

GOOD MORNING

HAVE A BEAUTIFUL DAY

KEEP SMILE

BE HAPPY ^_^

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Answered by llitzyourbfll
2

Answer:

esko bhi dedo pls brianlist mark dedo

The mean of 10 of them is 15 and the mean of 20 of them is 11.

The last two numbers are 10.

To Find :-

What is the mean of the 32 numbers.

Formula Used :-

\clubsuit♣ Mean Formula :

\begin{gathered}\longmapsto \sf\boxed{\bold{\pink{Mean =\: \dfrac{Sum\: of\: Observations}{Total\: number\: of\: Observations}}}}\\\end{gathered}

Mean=

TotalnumberofObservations

SumofObservations

Solution :-

First, we have to find the sum of observations of 10 number :

Given :

Mean = 15

Total number of observations = 10

According to the question by using the formula we get,

\implies \sf 15 =\: \dfrac{Sum\: of\: Observations}{10}⟹15=

10

SumofObservations

By doing cross multiplication we get,

\implies \sf Sum\: of\: observations =\: 10(15)⟹Sumofobservations=10(15)

\begin{gathered}\implies \sf Sum\: of\: observations =\: 10 \times 15\\\end{gathered}

⟹Sumofobservations=10×15

\begin{gathered}\implies \sf\bold{\green{Sum\: of\: observations =\: 150}}\\\end{gathered}

⟹Sumofobservations=150

Hence, the sum of observations is 150.

Again, we have to find the sum of observations of 20 number:

Given :

Mean = 11

Total number of observations = 20

According to the question by using the formula we get,

\implies \sf 11 =\: \dfrac{Sum\: of\: Observations}{20}⟹11=

20

SumofObservations

By doing cross multiplication we get,

\implies \sf Sum\: of\: observations =\: 20(11)⟹Sumofobservations=20(11)

\implies \sf Sum\: of\: observations =\: 20 \times 11⟹Sumofobservations=20×11

\implies\sf\bold{\green{Sum\: of\: observations =\: 220}}⟹Sumofobservations=220

Now, we have to find the sum of observations 32 numbers:

\begin{gathered}\implies \sf Sum\: of\: observations =\: 150 + 220 + 10 + 10\\\end{gathered}

⟹Sumofobservations=150+220+10+10

\begin{gathered}\implies \sf Sum\: of\: observations =\: 370 + 20\\\end{gathered}

⟹Sumofobservations=370+20

\implies \sf\bold{\purple{Sum\: of\: observations =\: 390}}⟹Sumofobservations=390

Now, we have to find the mean of the 32 numbers:

Given :

Sum of observations = 390

Total number of observations = 32

According to the question by using the formula we get,

\implies \sf Mean =\: \dfrac{\cancel{390}}{\cancel{32}}⟹Mean=

32

390

\implies \sf Mean =\: \dfrac{\cancel{195}}{\cancel{16}}⟹Mean=

16

195

\implies \sf \bold{\red{Mean =\: 12.1875}}⟹Mean=12.1875

\therefore∴ The mean of the 32 numbers is 12.1875.

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