Interpretation of Data Questions and Answers

Answer: A

The contribution of wind and solar power is 6.79 GW. From the pie chart, wind and solar energy supply 7 per cent of the total of 97 GW, so

The value 9.7 GW is 10 per cent of the total, 19.4 GW is 20 per cent, which is the share of hydro power, and 29.1 GW is 30 per cent, so these come from reading the wrong sector or the wrong percentage. The answer is 6.79 GW.

Answer: B

The contribution of the renewable sources is 26.19 GW. In the pie chart the renewable sources are hydro power at 20 per cent and wind and solar energy at 7 per cent, which together make 27 per cent of the 97 GW total:

Nuclear power and fossil fuels are not renewable. The value 29.1 GW would be 30 per cent, which adds the 3 per cent of nuclear power, 67.9 GW is the share of fossil fuels at 70 per cent, and 97 GW is the whole generation. The answer is 26.19 GW.

Answer: D

Each item in the table is given as a percentage of total government expenditure. The largest item, education, sports and youth affairs, is 4.04 in 2008-09, and every other item is smaller. So all nine items in the table are below 5 percent of total expenditure in 2008-09, which makes the answer 'all the above'. The choices of one, three or five activities each count only some items and ignore the others that also lie below 5.

Answer: B

Compare the total expenditure on social services from year to year: 11.06, 12.94, 13.06 and 14.02.

\[ 2008\text{-}09:\ 12.94-11.06=1.88 \]

\[ 2009\text{-}10:\ 13.06-12.94=0.12 \]

\[ 2010\text{-}11:\ 14.02-13.06=0.96 \]

The biggest rise, 1.88 points or about 17 percent, is in 2008-09. The answer is 2008-09. In percentage terms the rise in 2008-09 is about 17 percent, against about 1 percent in 2009-10 and about 7 percent in 2010-11.

Answer: C

An item is stagnant if its share hardly changes. Information and broadcasting stays at 0.22, 0.22, 0.20 and 0.22 over the four years. North-eastern areas jumps from 0.00 to 1.56, welfare to SC/ST and OBC rises from 0.36 to 0.63, and social welfare and nutrition changes from 0.82 to 1.06. The answer is information and broadcasting. The share of information and broadcasting varies only between 0.20 and 0.22 over the four years, a spread of 0.02, while the others change by much more.

Answer: D

Add the three small items, information and broadcasting, welfare to SC/ST and OBC, and labour and employment, for each year and compare with social welfare and nutrition.

\[ 2007\text{-}08:\ 0.22+0.36+0.27=0.85\ (0.82) \]

\[ 2008\text{-}09:\ 0.22+0.35+0.27=0.84\ (0.72) \]

\[ 2009\text{-}10:\ 0.20+0.41+0.22=0.83\ (0.79) \]

\[ 2010\text{-}11:\ 0.22+0.63+0.25=1.10\ (1.06) \]

Social welfare and nutrition is within about 0.1 of the sum of the three in every year, so it is the item almost equal to the remaining three. The answer is social welfare and nutrition.

Answer: B

Calculate the percentage rise in each item's share from 2007-08 to 2010-11.

\[ \text{Education: } \frac{4.46-4.02}{4.02}\approx 11\% \]

\[ \text{SC/ST and OBC: } \frac{0.63-0.36}{0.36}=75\% \]

\[ \text{Social welfare: } \frac{1.06-0.82}{0.82}\approx 29\% \]

\[ \text{Overall: } \frac{14.02-11.06}{11.06}\approx 27\% \]

Welfare to SC/ST and OBC has the highest rate, 75 percent. The answer is welfare to SC/ST and OBC.

Answer: A

Compare each item's share in 2007-08 and 2009-10.

\[ \text{Labour: } \frac{0.22-0.27}{0.27}\approx -18.5\% \]

\[ \text{Health: } \frac{1.90-2.05}{2.05}\approx -7.3\% \]

\[ \text{Social welfare: } \frac{0.79-0.82}{0.82}\approx -3.7\% \]

\[ \text{Education: } \frac{3.96-4.02}{4.02}\approx -1.5\% \]

Labour and employment has the highest rate of decline. The answer is labour and employment.

Answer: D

The employee with the most working days is E.

Add each column over the five years:

• A: 280 + 300 + 310 + 315 + 295 = 1500
• B: 310 + 290 + 300 + 310 + 300 = 1510
• C: 315 + 310 + 315 + 315 + 300 = 1555
• D: 315 + 315 + 310 + 310 + 305 = 1555
• E: 320 + 325 + 320 + 330 + 310 = 1605

E has the highest total, 1605. E also has the highest figure in every single year, which confirms the result without the full addition.

Answer: B

The employees with equal totals are C and D.

The five-year totals are A 1500, B 1510, C 1555, D 1555 and E 1605. Only C and D are equal, at 1555 each.

A and B differ by 10 (1500 against 1510), B and D by 45, and A, B and C are all different. So every option other than 'C and D' names employees whose totals do not match.