Consider the following graphs. The curves in the graphs indicate different age groups in the populations of two countries A and B over a period of few decades : *Country A* ![Line graph for Country A showing population in millions for age groups <15, 15-64, and 64+ from 1950 to 2050. The <15 group (solid line) peaks around 1970 and then declines. The 15-64 group (dotted line) rises sharply from 1950 to 2010 and then slightly declines. The 64+ group (dashed line) remains low until 2010 and then rises steadily.](/media/pyqs/csat/images/csat_hi_2018_q71_question_text_164.webp)

Estimated Population Data for Country A (in millions)
Year	<15	15-64	64+
1950	0.2	0.35	0.05
1970	0.35	0.45	0.08
1990	0.32	0.8	0.1
2010	0.28	1.0	0.15
2030	0.25	0.95	0.25
2050	0.22	0.85	0.35

Years <15 15-64 64+ *Country B* ![Line graph for Country B showing population in millions for age groups <15, 15-64, and 64+ from 1950 to 2050. The <15 group (solid line) peaks around 2010. The 15-64 group (dotted line) rises steadily from 1950 to 2050. The 64+ group (dashed line) remains low until 2010 and then rises steadily.](/media/pyqs/csat/images/csat_hi_2018_q71_question_text_165.webp)

Estimated Population Data for Country B (in millions)
Year	<15	15-64	64+
1950	0.15	0.2	0.05
1970	0.25	0.35	0.08
1990	0.32	0.55	0.1
2010	0.35	0.75	0.15
2030	0.32	1.0	0.25
2050	0.28	1.1	0.35

Years <15 15-64 64+ With reference to the above graphs, which of the following are the **most logical and rational inferences** that can be made? 1. 1. Over the last two and a half decades, the dependency ratio for country B has decreased. 2. 2. By the end of next two and a half decades, the dependency ratio of country A will be much less than that of country B. 3. 3. In the next two decades, the workforce relative to its total population will increase in country B as compared to country A. Select the correct answer using the code given below.

If XXX is between −3-3−3 and −1-1−1 , and YYY is between −1-1−1 and 111 , then X2−Y2X^2 - Y^2X2−Y2 is in between which of the following?

If $X$ is between $-3$ and $-1$ , and $Y$ is between $-1$ and $1$ , then $X^2 - Y^2$ is in between which of the following?