IELTS в RBSM

Which household utility had the greatest increase in price between 2001and 2005?

(Please select 1 option)

1. Gas
2. Electricity
3. Water (Water bills increased by 1% in 2001, 8% in 2002, 6% in 2003, 5% in 2004 and 4% in 2005. Another way of looking at this is to say that water bills increased by an average of 4.8% per year during the period 2001-2005. This is higher than any of the other utilities shown.)
4. Telephone
5. Refuse collection

 

Which household utility showed the greatest change in price between 2002 and 2004?

(Please select 1 option)

1. Gas
2. Electricity
3. Water (Water bills increased by 8% in 2002, 6% in 2003 and 5% in 2004, making a total increase of 19% over the three years. Electricity rose by 9% and gas by 13% over the same period.)
4. Telephone
5. Refuse collection

In which year did prices for all the utilities change by the most similar amount?

(Please select 1 option)

1. 2001
2. 2002
3. 2003
4. 2004 (The mathematical way of reaching this answer is to work out the average increase of all the utilities for each year and then look at the distribution of individual increases in each year. This is time-consuming and cumbersome. Simply looking at the bars for each year should enable you to decide in which year the bars are most similar in magnitude.)
5. 2005

If the electricity bill at the end of 2000 was 200, and electricity usage remained constant, what was the bill at the end of 2004?

(Please select 1 option)

1. £202
2. £204 s
3. £108
4. £214
5. None of the above (It is important to remember that the price increases shown for each year are cumulative. Thus a bill of 200 at the end of 2000 would rise to 204 at the end of 2001 (a 2%) rise but would be somewhat more than 208 at the end of 2002 (since 2% of 204 is more than 2% of 200).