The ratio of the number of men to the mumber of women in an office is 2:3. If the average weights of the men and the women in the office are 56 kg and 51 kg, respectively, find the average weight of the employees in the office (in kg).

In a class, the number of boys is 40% more than that of girls. In an examination, the average marks obtained by boys is 20% less than the average marks obtained by girls. If the average marks obtained by all the boys and girls is 53, then what is the average marks obtained by the boys ?

The average weight of the girls in a group is 58 kg. When 5 girls of average weight 60 kg leave the group or 5 girls of average weight 55.5 kg join the group, the average weight of girls in both cases is equal. What is the number of girls, initially, in the group?

The average of first 148 odd natural numbers, is:

The weight of five tables in a shop are 9.8 kg, 12.42 kg, 25.38 kg, 4.426 kg and 32.388 kg. Shop keeper got one more table and now total weight is 100 kg. The weight of new table is