Practice Permutation and Combination – In a software development company 30% workers are B.Tech degree holders,25% are MBAs, and 20% hold both these degrees.If325 workers are without any professional degree,how many workers are there in the company in all?
Practice Percentage – The ratio of Boys to Girls is 6:4. 60% of the boys and 40% of girls take lunch in the canteen. What % of class takes lunch in canteen.
Practice Percentage – A student multiplied a number by 3/5 instead of 5/3. What is the percentage error in the calculation?
Practice Percentage – A shepherd has 1 million sheep at the beginning of Year 2000. The numbers grow by x% (x > 0) during the year. A famine hits his village in the next year and many of his sheep die. The sheep population decreases by y% during 2001 and at the beginning of 2002 the shepherd finds that he is left with 1 million sheep. Which of the following is correct?
Practice Percentage – A business school club, Friends of Foam, is throwing a party at a local bar. Of the business school students at the bar, 40% are first year students and 60% are second year students. Of the first year students, 40% are drinking beer, 40% are drinking mixed drinks, and 20% are drinking both. Of the second year students, 30% are drinking beer, 30% are drinking mixed drinks, and 20% are drinking both. A business school student is chosen at random. If the student is drinking beer, what is the probability that he or she is also drinking mixed drinks?
Practice Percentage – Population of a village is eight thousand. If 6% men and 10% women are added, population becomes 8,600, then the number of men in the village was:
Practice Percentage – Which of the following multipliers will cause a number to be increased by 29.7% ?
Practice Percentage – In a town the population grows at a simple rate of 10% in a decade and compounds from decade to decade. Find the population at the beginning of the 1970s if the population at the beginning of the 1990s is 3,63,000 people.
Practice Percentage – In an examination, 70% of students passed in physics, 65% in chemistry, 27% failed in both subjects. The percentage of students who passed is:
Practice Percentage – The price of sugar is increased by 25%. In order not to increase the expenditure a lady must reduce her consumption by:
Practice Percentage – When 40 is subtracted from 50% of a number, the result is 50% of 500. Find one-tenth of the number.
Practice Percentage – About 4 out of 5 people are right handed. If there are 40 employees in the office, how many work the right handed?
Practice Percentage – If x% of a is the same as y% of b, then z% of b is :
Practice Percentage – The population of a village decreases at the rate of 20% per annum. If its population 2 years ago was 10,000. What is its present population ?
Practice Percentage – A city has a population of 3,00,000 out of which 1,80,000 are males. 50% of the population is literate. If 70% of the males are literate, the number of literate females is :