Question 1 :
Tara's three bowling scores in a tournament were $167, 178$, and $186$. What was her average score for the tournament?

Question 2 :
There are $60$ students out of which $25$ are girls. The average weight of girls is $40Kg$ and that of boys is $53Kg$. Mean weight of the entire class?

Question 3 :
The mean of the distribution, in which the values of $X$ are $1,2,...,n$ the frequency of each being unity is:

Question 4 :
Three friends went to a hotel and had breakfast to their taste, paying Rs 16, Rs 17 and Rs 21 respectively <br/>(i) Find their mean expenditure.<br/>(ii) If they have spent 3 times the amount that they have already spent, what would their mean expenditure be? <br/>(iii) If the hotel manager offers 50% discount, what would their mean expenditure be? <br/>

Question 5 :
The weight (in $kg$) of $5$ men are $62, 65, 69, 66$ and $61$. The median is

Question 6 :
The numbers 3, 5, 6 and 4 have frequencies of x, x + 2, x - 8 and x + 6 respectively If their mean is 4 then the value of x is

Question 7 :
The mean of the following natural numbers $1, 2,3 ...... 10$ is

Question 8 :
The mean of $20$ observations is $12.5$ by error one observation was noted $-15$ instead then the correct mean is

Question 9 :
The mean of 96, 104, 121, 134, 142, 149, 153 and 161 is 132.5<br>If true then enter $1$ and if false then enter $0$<br>

Question 10 :
The mean of $13$ observations is $14$. If the mean of the first $7$ observations is $12$ and that of the last $7$ observations is $16$, then the $7^{th}$ observation is ___________.

Question 11 :
Find the mean of the following continuous distribution.<br/><table class="table table-bordered"><tbody><tr><td>&#160;Class interval</td><td>$10-15$&#160;</td><td>$15-20$&#160;</td><td>$20-25$&#160;</td><td>$25-30$&#160;</td><td>$30-35$&#160;</td></tr><tr><td>&#160;Frequency</td><td>&#160;$8$</td><td>$11$&#160;</td><td>$6$&#160;</td><td>$13$&#160;</td><td>$12$&#160;</td></tr></tbody></table>

Question 12 :
What is the average (arithmetic mean) of all numbers multiples of $6$ from $6$ to $510$ inclusive?