Rule Of Three Simple And Compound - Worksheet

1. Out of a sample of 2100 people, 682 people in a public opinion poll pointed out they would cast their vote for a particular nominee. How many votes can be expected by the candidate from a population of 37,000?

2. Emily has 2 hours to read a novel. She was able to read 19 pages in half hour. If she reads with the same pace, then, a.) How long would it take her to read a 110 page novel? b.) How long would it take Emily to complete a book of 500 pages? Give your answer in hours and minutes and if required, round it to the nearest minute.

3. If 24 trees are chopped down to produce 3000 pounds of paper in one month, then how many trees are required for their wood in the next month if double the amount of paper is to be produced? How many trees would be required to make 12000 pounds of paper?

4. A group of 32 students took a study trip to USA and paid $2310 per head for 3 nights stay in a hotel. Another group of 35 students from college also decided to go there. Their budget is $87000, how many nights can they stay in the same hotel?

5. There are 10 cows in a farm. Let us assume that every cow gives 15liter of milk every day. A milkman collects milk after every three days from that farm. Once, he gets sick and could not come to collect milk. After getting well again, he returns to the farm and sees that now there are 12 cows there. How much milk would he collect from them?

6. There were a total of around 26 million computers and around 40 million people in the late 19th century. Due to the advancement in technology, the number of computers has tremendously increased at 4.5% each year (assumed) and the increase in population is 2% every year. When would be the time when every person (on average) would have a personal computer?

7. Two friends, Jennifer and Lisa decide to buy a present as their best friend Emily's birthday was coming the next week. They decided to give her a combined gift of her favorite perfume, and that they can share what it will cost. The perfume that Emily loved was worth $100 dollars per bottle. Jennifer did not get her pocket money yet so she could not pay equal the amount Lisa was ready to pay. So they decided that Lisa would give $4 for every $3 dollars Jennifer would give. For every $20 that Lisa gives, how much will Jennifer pay? Also tell the total amount that both Lisa and Jennifer paid for the perfume individually.