If the mean of the observations:
$x, x + 3, x + 5, x + 7, x + 10$ is $9$ , the mean of the last three observations is

10 \frac{1}{3}

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10 \frac{2}{3}

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11 \frac{1}{3}

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11 \frac{2}{3}

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Solution

The correct option is C $11 \frac{1}{3}$
Mean of $x, x + 3, x + 5, x + 7, x + 10 = 9$
Sum of the terms $= 5 x + 25$
Mean = $\frac{5 x + 25}{5} = 9$
$x + 5 = 9$
$x = 4$
Last three observations are $9, 11, 14$
Mean $= \frac{9 + 11 + 14}{3} = 11 \frac{1}{3}$

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Similar questions

Q. Question 12
If the mean of the observations x, x+3, x+5, x+7 and x+10 is 9, then mean of the last three observation is:

A)

10 \frac{1}{3}

10 \frac{2}{3}

11 \frac{1}{3}

11 \frac{2}{3}

Choose the correct answer in each of the following questions:
If the mean of x, x + 3, x+5, x +7, x+ 10 is 9, the mean of the last three observations is
(a) $10 \frac{1}{3}$
(b) $10 \frac{2}{3}$
(c) $11 \frac{1}{3}$
(d) $11 \frac{2}{3}$

Q. If the mean of the observations

x, x + 3, x + 5, x + 7, x + 10

9

, the mean of the last three observations is:

Q. If the mean of x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of the last three observations is
(a)

10 \frac{1}{3}

(b)

10 \frac{2}{3}

(c)

11 \frac{1}{3}

(d)

11 \frac{2}{3}

Q. If the mean of the observation : x, x + 3, x + 5, x + 7, x + 10 is 9, the mean of last three observation is

(a) \frac{31}{3} (b) \frac{32}{3} (c) \frac{34}{3} (d) \frac{35}{3}

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If the mean of the observations:x,x+3,x+5,x+7,x+10 is 9, the mean of the last three observations is

The correct option is C 1113Mean of x,x+3,x+5,x+7,x+10=9Sum of the terms =5x+25Mean = 5x+255=9x+5=9x=4Last three observations are 9,11,14Mean =9+11+143=1113

If the mean of the observations:
$x, x + 3, x + 5, x + 7, x + 10$ is $9$ , the mean of the last three observations is

The correct option is C $11 \frac{1}{3}$
Mean of $x, x + 3, x + 5, x + 7, x + 10 = 9$
Sum of the terms $= 5 x + 25$
Mean = $\frac{5 x + 25}{5} = 9$
$x + 5 = 9$
$x = 4$
Last three observations are $9, 11, 14$
Mean $= \frac{9 + 11 + 14}{3} = 11 \frac{1}{3}$