Question

sum of 5 observations is 20+x and
mean is 20 then x=​

Answer 1

$\LARGE{ \underline{\underline{ \red{ \bf{Required \: answer:}}}}}$

GiveN:

• Sum of the observations = 20 + x
• No. of observations = 5
• Mean of the observations = 20

To FinD:

• The value of x here?

Step-wise-Step Explanation:

We know the formula for mean:

$\rm{Mean = \dfrac{Sum \: of \: all \: observations}{No. \: of \: observations} }$

Now plugging all the given values:

⇒ 20 = 20 + x / 5

Cross multiplying,

⇒ 20 × 5 = 20 + x

⇒ 20 + x = 100

⇒ x = 80

Hence, the required value of x is 80. And we are done :)

Explore more!!

• Mean is sometimes known as Arithmetic mean or Average. The formula is same for all.

• Median and mode are other quantities which determines the middle value of a areanged data and most frequently occuring event in a given data.

Answer 2

Answer:

80

Step-by-step explanation:

mean=sum of observation/no.of observation

20=20+x/5

20×5=20+x

100=20+x

100-20=x

80=x

There for x= 80

I hope u will like it