Section-1

1. The numbers of non-CS students who took AI and ML were in the ratio 2 : 5.

2. The number of non-CS students who took either AI or ML was equal to the number of CS students.

3. The numbers of non-CS students who failed in the two courses were the same and their total is equal to the number of CS students who got a C grade in ML.

4. In both the courses, 50% of the students who passed got a B grade. But, while the numbers of students who got A and C grades were the same for AI, they were in the ratio 3 : 2 for ML.

5. No CS student failed in AI, while no non-CS student got an A grade in AI.

6. The numbers of CS students who got A, B and C grades respectively in AI were in the ratio 3 : 5 : 2, while in ML the ratio was 4 : 5 : 2.

7. The ratio of the total number of non-CS students failing in one of the two courses to the number of CS students failing in one of the two courses was 3 : 1.

8. 30 students failed in ML.

1

Number of students took AI = 210 + 60 = 270.

12

Number of CS students failed in ML is 12.

27

Number of non-CS students got A grade in ML
is 27.

1

Number of students got A grade in AI is 63 + 0
= 63.

4

Number of non-CS students got B grade in ML
is 75.

At the beginning of the tournament, the players had Rs. 10 each. The following table shows partial information about the amounts that the players had at the end of each of the eight rounds. It shows every time a player had Rs. 10 at the end of a round, as well as every time, at the end of a round, a player had either the minimum or the maximum amount that he would have had across the eight rounds. For example, Suresh had Rs.10 at the end of Rounds 1, 3, and 8 and not after any of the other rounds. The maximum amount that he had at the end of any round was Rs. 13 (at the end of Round 5), and the minimum amount he had at the end of any round was Rs. 8 (at the end of Round 2). At the end of all other rounds, he must have had either Rs. 9, Rs. 11, or Rs. 12.

It was also known that Pulak and Qasim had the same amount of money with them at the end of Round 4.

3

Ritesh had exactly Rs.6 at the end of Round 8.

4

Pulak had exactly Rs.12 at the end of Round 6.

6

Ritesh had exactly Rs.6 at the end of Round 4.

6

From the table we can see that the amounts
increased or decreased by 2 at 12 instances, so
there are exactly 6 matches that were paid with a
bet of Rs.2.

3

In Round 5 Pulak and Ritesh played against each
other.

The following facts are also known:

1. There was at least one new case in every neighbourhood on Day 1.

2. On each of the five days, there were more new cases in Kitmisto than in Pesmisto.

3. The number of new cases in the city in a day kept increasing during the five-day period. The number of new cases on Day 3 was exactly one more than that on Day 2.

4. The maximum number of new cases in a day in Pesmisto was 2, and this happened only once during the five-day period.

5. Kitmisto is the only place to have 3 new cases on Day 2.

6. The total numbers of new cases in Levmisto, Tyhrmisto, Pesmisto and Kitmisto over the five-day period were 12, 12, 5 and 14 respectively.

1

The total number of new cases in the city on Day 2 was 8.

4

The number of new cases in Levmisto on Day 3 was 3.

2

Only on Day 3 Pesmisto did not have any new case.

4

Both Statement A and Statement B are necessarily false.

4

All 5 days Levmisto and Tyhrmisto have the same number of new cases.

A study to determine the mortality rate for a disease began in 1980. The study chose 1000 males and 1000 females and followed them for forty years or until they died, whichever came first. The 1000 males chosen in 1980 consisted of 250 each of ages 10 to less than 20, 20 to less than 30, 30 to less than 40, and 40 to less than 50. The 1000 females chosen in 1980 also consisted of 250 each of ages 10 to less than 20, 20 to less than 30, 30 to less than 40, and 40 to less than 50.

The four figures below depict the age profile of those among the 2000 individuals who were still alive in 1990, 2000, 2010, and 2020. The blue bars in each figure represent the number of males in each age group at that point in time, while the pink bars represent the number of females in each age group at that point in time. The numbers next to the bars give the exact numbers being represented by the bars. For example, we know that 230 males among those tracked and who were alive in 1990 were aged between 20 and 30.

3

In 2020, number of dead males

= 1000 – (180 + 205 + 160 + 100) = 355

In 2020, number of dead females

= 1000 – (210 + 175 + 150 + 120) = 345

Hence, required ratio = 355 : 345 = 71 : 69.

4

The number of people who were being tracked and
who were between 30 and 40 years of age in 1980
survived until 2010 = 90 + 100 = 190.

4

The number of individuals who were being tracked
and who were less than 30 years of age in 1980
survived until 2020 = 140 + 125 + 100 + 105 = 470.

40

Number of the males who were being tracked and
who were between 20 and 30 years of age in 1980
died in the period 2000 to 2010 = 205 – 165 = 40.

30

Number of the females who were being tracked
and who were between 20 and 30 years of age in
1980 died between the ages of 50 and 60
= 175 – 145 = 30.