Question

3
Find the arithmetic mean of 13 and 19​

Answer 1

Answer:

32/2 = 16

Step-by-step explanation:

we know that, arithmetic mean is the sum of all observations upon no. of observations.

so,

=13+19/2

=32/2

=16

Answer 2

$\displaystyle\huge\red{\underline{\underline{Solution}}}$

DERIVATION

Let a & b be two numbers

Let c be the arithmetic mean

Then

a, c , b are in Arithmetic Progression

So

Common Difference is same

$\implies \: c - a = b - c$

$\implies \: 2c = a + b$

$\displaystyle \: \implies \: c = \frac{a + b}{2}$

So the arithmetic mean of a & b is

$\displaystyle \: \frac{a + b}{2}$

TO DETERMINE

The arithmetic mean of 13 and 19

CALCULATION

From above we can say that the arithmetic mean of 13 and 19 is

$= \displaystyle \: \frac{13 + 19}{2}$

$\displaystyle \: \frac{32}{2}$

$= 16$