ISRO Administrative Officer 2007

At an International Dinner, $$\frac{1}{5}$$ of the people attending were French men. If the number of French women at the dinner was $$\frac{2}{3}$$ greater than the number of French men, and there were no other French people at the dinner, then what fraction of the people at the dinner were not French?

In Arun’s opinion, his weight is greater than 65 kg but less than 72 kg. His brother does not agree with Arun and he thinks that Arun’s weight is greater than 60 kg but less than 70 kg. His mother’s view is that his weight cannot be greater than 68 kg. If ail of them are correct in their estimation, what is the average of different probable weight of Arun?

In an election between two candidates, 75% of the voters cast their votes, out of which 2% of the votes were declared invalid. A candidate got 9261 votes which were 75% of the total valid votes. Find the total number of votes enrolled in that election.

If the manufacturer gains 10%, the wholesale dealer 15% and the retailer 25%, then find the cost of production of a table, the retail price of which is Rs.1265?

60 kg of an alloy A is mixed with 100 kg of alloy B. If alloy A has lead and tin in the ratio 3 : 2 and alloy B has tin and copper in the ratio 1: 4, then the amount of tin in the new alloy is:

A invested Rs.76,000 in a business. After few months, B joined him with Rs.57,000. At the end of the year, the total profit was divided between them in the ratio 2 : 1. After how many months did B join?

2 men and 3 boys can do a piece of work in 10 days while 3 men and 2 boys can do the same work in 8 days. In how many days can 2 men and 4 boy do the work?

Four years ago,the father’s age was three times the age of his son. The total of the ages of the father and the son after four years will be 64 years. What is the father’s age at present?

A rectangular grassy plot 110 m by 65 m has a gravel path 2.5 m wide all round it on the inside. Find the cost of gravelling the path at 80 paise per sq. metre.

Two equal amounts of money was lent out at 6% and 5% simple interest respectively at the same time. The former is recovered two years earlier than the latter and the amount so recovered in each case is Rs. 2,880. Determine the amount that was lent out.