If the mean of $12, 13, x, 17, 18$ and $20$ is $16,$ then $x = \ldots \ldots \ldots \ldots .$

  • A
    $4$
  • B
    $8$
  • C
    $12$
  • D
    $16$

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Similar Questions

The mode of the following frequency distribution is $37$. Find the missing frequency $x$.
Class$0-10$$10-20$$20-30$$30-40$$40-50$$50-60$$60-70$
Frequency$4$$7$$x$$18$$15$$8$$7$

The following table gives the number of pages written by Sarika for completing her own book over $30$ days:
Number of pages written per day $16-18$ $19-21$ $22-24$ $25-27$ $28-30$
Number of days $1$ $3$ $4$ $9$ $13$

Find the mean number of pages written per day.

The mean of the following frequency distribution is $46$. Find the missing frequency $f$.
Class $0-20, 20-40, 40-60, 60-80, 80-100, 100-120$
Frequency $10, f, 7, 6, 5, 4$

The mean of the following frequency distribution is $28.5$ and the total frequency is $60$. Find the missing frequencies $f_{1}$ and $f_{2}$.
Class $0-10$ $10-20$ $20-30$ $30-40$ $40-50$ $50-60$
Frequency $6$ $f_1$ $20$ $15$ $f_2$ $4$

The mean of $15$ observations is $25$. Later on,it was found that one observation was taken by mistake as $20$ instead of $50$. Then,the correct mean is:

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