The average weight of a group of 20 boys was calculated to be 89.4 kg and it was later discovered that one weight was misread as 78 kg instead of 87 kg. The correct average weight is 

The speed of the current is 5 km / hour. A motorboat goes 10 km upstream and back again to the starting point in 50 minutes. The speed (in km / hour) of the motorboat in still water is: 

When the average age of husband, wife and their son was 42 years, the son got married and a child was born just one year after marriage. When the child turned to be 5 years, the average age of the family becomes 36 years. What was the age of daughter-in-law at the time of marriage?

Direction: Study the following table carefully to answer these questions.

Number of students appeared from school E in 2004 is approximately what per cent of the total number of students appeared from all the schools together in that year? 

A shopkeeper had 2000 kgs of rice. He sold a part of it at 11% profit and the rest at 17% profit, so that he made a total profit 15.2%. How much rice (in kgs) did he sell at 17% profit?

A, B, C and D have to share the profit in the ratio of 4: 8: 11: 15. If there is a difference of Rs 22,000 between the minimum and maximum ratios, what is the sum of the other two ratios?

The expenditure on the cost of living of a man and his family is 60% of his salary. He gets two increments of 30% and 60% in his salary. If his saving increases by 250% of his initial saving, then the new cost of living expenditure is what percentage (rounded off to the nearest integer) of the increased salary?