If the mean of $x, x + 3, x + 5, x + 7$ and $x + 10$ is 9, then the value of second observation is ____.

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Solution

The correct option is C 7
Mean of $x, x + 3, x + 5, x + 7$ and $x + 10$ = 9
$⟹ \frac{x + (x + 3) + (x + 5) + (x + 7) + (x + 10)}{5} = 9$
$⟹ \frac{5 x + 25}{5} = 9$
$⟹ x = 4$
So, the second observation, $x + 3 = 7.$

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Q. If the mean of x, x+3, x+5, x+7 and x+10 is 9, then the value of second observation is ____ .

Q. The mean of x, x+3, x+5, x+7, x+10 is 9, the value of second observation is:

Mark the correct option:

If , the value of x is

A. 5

B. 6

C. 7

D. 8

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If the mean of x,x+3,x+5,x+7 and x+10 is 9, then the value of second observation is ____.

The correct option is C 7Mean of x,x+3,x+5,x+7 and x+10 = 9 ⟹x+(x+3)+(x+5)+(x+7)+(x+10)5=9 ⟹5x+255=9 ⟹x=4 So, the second observation, x+3=7.

If the mean of $x, x + 3, x + 5, x + 7$ and $x + 10$ is 9, then the value of second observation is ____.

The correct option is C 7
Mean of $x, x + 3, x + 5, x + 7$ and $x + 10$ = 9
$⟹ \frac{x + (x + 3) + (x + 5) + (x + 7) + (x + 10)}{5} = 9$
$⟹ \frac{5 x + 25}{5} = 9$
$⟹ x = 4$
So, the second observation, $x + 3 = 7.$