The average of X<sub>1</sub>, X<sub>2</sub> and X<sub>3</sub> is 14. Twice the sum o…

Of the three numbers, the average of the first and the second is greater than the average of the second and the third by…

The total marks obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained…

Nine persons went to a hotel for taking their meals. Eight of them spent Rs.12 each on their meals and the ninth spent R…

The average price of 10 books is Rs.12 while the average price of 8 of these books is Rs.11.75. Of the remaining two boo…

The frequency distribution data is given below. If the average age is 17 years, the value of m is<br> <table cl…

The average of 20 numbers is zero. Of them, at the most, how many may be greater than zero?

The average weight of A, B and C is 40 kgs. Weight of C is 24 kgs more than A’s weight and 3 kgs less than B&rsquo…