Question

If the mean of 7,5,13, x and 9 is 10, th tre x is 16. true .false​

Answer 1

Given :

• Mean of 7 , 5 , 13 , 9 , x = 10

To find :

• x
• x = 16 . True or false

Formula used :

Mean = Sum of all observation ÷ Number of observation

Solution :

• Total number of observation = 5
• Mean = 10
• Sum of observation = ( 7 + 5 + 13 + 9 + x )

➝ Mean = Sum of all observation ÷ Number of observation

➩ 10 = ( 7+5+13+9+x ) ÷ 5

➩ 10 × 5 = 34 + x

➩ 50 = 34 + x

➩ x = 50 - 34

➩ x = 16

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ANSWER :

• x = 16
• True