A student finds the average of ten 2 digits numbers. While copying numbers, by mistake, he writes in number with its dig…

Of the three numbers, the first is twice the second and the second is twice the third. The average of the reciprocal of …

16 children are to be divided into two groups A and B of 10 and 6 children. The average percent marks obtained by the ch…

What is the average of the first six (positive) odd number each of which is divisible by 7?

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

When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is …

The average of the two-digit numbers, which remain the same when the digits interchange their positions, is-

There are five boxes in a cargo hold. The weight of the first box is 200 kg and the weight of the second box is 20% more…