Birth rates and Death rates per thousand : From the above table in which years do you see the difference between Birth rate and Death rate the same ?Year Birth rate Death rate 1961 90 20 1971 88 18 1981 82 17 1991 78 16 2001 75 14 2011 70 12 2021 60 10
1961, 1971
The quantity asked for is the gap between the two columns, which demographers call the rate of natural increase. Work it out for every row.
1961: \(90 - 20 = 70\). 1971: \(88 - 18 = 70\). 1981: \(82 - 17 = 65\). 1991: \(78 - 16 = 62\).
2001: \(75 - 14 = 61\). 2011: \(70 - 12 = 58\). 2021: \(60 - 10 = 50\).
The full list of differences is 70, 70, 65, 62, 61, 58 and 50. Only the first two values repeat, so the pair of years sharing an identical difference is 1961 and 1971.
The remaining options can be dismissed from the same list: 2011 and 2021 give 58 against 50, 2001 and 2011 give 61 against 58, and 1971 and 1981 give 70 against 65.
Hence the difference between the birth rate and the death rate is the same in the years 1961 and 1971.
Similar Questions
Directions : Question numbers 33 and 34 are based on the following information :
Number of working days annually :
Year / Employee A B C D E 2018 280 310 315 315 320 2019 300 290 310 315 325 2020 310 300 315 310 320 2021 315 310 315 310 330 2022 295 300 300 305 310 Which employee has maximum working days during the years 2018-2022 ?
Which employees have equal number of total working days during 2018-2022 ?
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