Question

the mean of 5 numbers is 18 . If number is 18 . If a no. is ommited then the mean of remainig 4 no. become 16 . Find ommitted number .​

Answer 1

Answer:

26

Step-by-step explanation:

given below

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Answer 2

Correct Question:

The mean of 5 numbers is 18. If a number is ommited then the mean of remainig 4 numbers is 16. Find ommitted number.

Answer:

The number ommitted is 26.

Step-by-step explanation:

Given :

Mean of 5 = 18

Mean of 4 = 16

To find :

The value of excluded number

Solution :

$\textsf{\underline{\underline{Case I - }}}$

• Mean = 18
• Observations = 5
• Sum of observations = ??

Sum of observations,

$\sf{\longrightarrow} \: 18 \times 5 \\ \sf{\longrightarrow} \: 90$

Sum of observations = 90

$\rule{300}{1}$

$\textsf{\underline{\underline{Case II -}}}$

• Mean = 16
• Observations = 4
• Sum of observations = ??

Sum of observations,

$\sf{\longrightarrow} \: 16 \times 4 \\ \sf{\longrightarrow} \: 64$

Sum of observations = 64

$\rule{300}{1}$

$\textsf{\underline{\underline{Ommitted number - }}}$

$\sf{\longrightarrow} \: 90 - 64 \\ \sf{\longrightarrow} \: 26$

The number ommitted = 26

$\therefore$ The number ommitted is 26.