Lennie Carroll

2020-10-18

A set of 12 numbers has an arithmetic mean of 20. if the numbers 10 and 14 are removed from the set, what is the arithmetic mean of the 10 numbers remaining in the set?

Asma Vang

Skilled2020-10-19Added 93 answers

For a set of positive numbers ${x}_{1},\text{}{x}_{2},\text{}\cdots ,\text{}{X}_{n}$ , the arithmetic mean is given as
$\text{Arithmetic Mean}=\text{}\frac{{x}_{1}\text{}+\text{}{x}_{2}\text{}+\text{}\cdots \text{}+\text{}{x}_{n}}{n}$
Now, set of 12 numbers which includes 10 and 14 has an arithmetic mean of 20.
Let x be the sum of the remaining 10 numbers.
$AM=\text{}\frac{x\text{}+\text{}10\text{}+\text{}14}{12}=20$

$\frac{x\text{}+\text{}24}{12}=20$

$x=240\text{}-\text{}24=216$
Now, we find the arithmetic mean of the remaining 10 numbers whose sum is
216.
$\therefore \text{}\frac{x}{10}=\text{}\frac{216}{10}=21.6$

$\frac{20b}{{\left(4{b}^{3}\right)}^{3}}$

Which operation could we perform in order to find the number of milliseconds in a year??

$60\cdot 60\cdot 24\cdot 7\cdot 365$ $1000\cdot 60\cdot 60\cdot 24\cdot 365$ $24\cdot 60\cdot 100\cdot 7\cdot 52$ $1000\cdot 60\cdot 24\cdot 7\cdot 52?$ Tell about the meaning of Sxx and Sxy in simple linear regression,, especially the meaning of those formulas

Is the number 7356 divisible by 12? Also find the remainder.

A) No

B) 0

C) Yes

D) 6What is a positive integer?

Determine the value of k if the remainder is 3 given $({x}^{3}+k{x}^{2}+x+5)\xf7(x+2)$

Is $41$ a prime number?

What is the square root of $98$?

Is the sum of two prime numbers is always even?

149600000000 is equal to

A)$1.496\times {10}^{11}$

B)$1.496\times {10}^{10}$

C)$1.496\times {10}^{12}$

D)$1.496\times {10}^{8}$Find the value of$\mathrm{log}1$ to the base $3$ ?

What is the square root of 3 divided by 2 .

write $\sqrt[5]{{\left(7x\right)}^{4}}$ as an equivalent expression using a fractional exponent.

simplify $\sqrt{125n}$

What is the square root of $\frac{144}{169}$