Question

The mean of 25, 24, 23, 21, 20, 22, 19, 18 and x is 25. Find x.​

Answer 1

Answer:

53 is the value of x.

Step-by-step explanation:

Mean =

$\frac{Sum \: of \: observations}{Number \: of \: observation}$

Sum of Observations = 25+24+23+22+21+20+19+18+x

= 172+x

Number of Observations = 9

So, as per formula,

$\frac{172 + x}{9} = 25$

$x = ({25 \times 9}) - 172$

$x = 225 - 172 \\ x = 53$

Therefore, value of x is 53.

Answer 2

Answer:

The red blood cells contain a pigment called hemoglobin, each molecule of which binds four oxygen molecules and Oxyhaemoglobin forms. The oxygen molecules are carried to individual cells in the body tissue where they are released. The binding of oxygen is a reversible reaction.