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Three participants – Akhil, Bimal and Chatur participate in a random draw competition for five days. Every day, each participant randomly picks up a ball numbered between 1 and 9, both inclusive. The number on the ball determines his score on that day. The total score of a participant is the sum of his scores attained in the five days. The total score of a day is the sum of participants' scores on that day. The 2-day average on a day, except on Day 1, is the average of the total scores of that day and of the previous day. For example, if the total scores of Day 1 and Day 2 are 25 and 20, then the 2-day average on Day 2 is calculated as 22.5. Table 1 gives the 2-day averages for Days 2 through 5.



Table 1: 2-day averages for Days 2
through 5
Day 2Day 3Day 4Day 5
1515.51617

Participants are ranked each day, with the person having the maximum score being awarded the minimum rank (1) on that day. If there is a tie, all participants with the tied score are awarded the best available rank. For example, if on a day Akhil, Bimal, and Chatur score 8, 7 and 7 respectively, then their ranks will be 1, 2 and 2 respectively on that day. These ranks are given in Table 2.



Table 2: Ranks of participants on each day
Day 1Day 2Day 3Day 4Day 5
Akhil12233
Bimal23211
Chatur31122

The following information is also known.

  1. Chatur always scores in multiples of 3. His score on Day 2 is the unique highest score in the competition. His minimum score is observed only on Day 1, and it matches Akhil's score on Day 4.
  2. The total score on Day 3 is the same as the total score on Day 4.
  3. Bimal's scores are the same on Day 1 and Day 3.

Who attains the maximum total score?

Solution

✅ Correct Option: 4
Slide 1/11

Understanding the set :-

  1. We are given that there are three participants – Akhil, Bimal and Chatur.
  1. Played a game for 5 days – where,

i) Every day, each participant randomly picks up a ball numbered between 1 and 9.

ii) number on the ball determines his score on that day

  1. 2-day average = average of scores of that day and previous day
  1. Participants are ranked each day, according to their scores (if tie same rank is given)

In this question we will try to find the scores of every participant each day.

Day 1Day 2Day 3Day 4Day 5Total
Akhil
Bimal
Chatur
Total Score

2 day average through day 2 to day 5.

Day 2Day 3Day 4Day 5
1515.51617

From table 2,

Let the total score of day 1, day 2, day 3, day 4, and day 5 are d1, d2, d3, d4, and d5, respectively.

The table shows that, the average of two days, d1 and d2 is 15,

then the average of two days d2 and d3 is 15.5, and so on (as given in the set).

d1+d2 = 30 ... (1),

d2+d3 = 31 ... (2),

d3+d4 = 32 .... (3),

d4+d5 = 34 ... (4)

Day 1Day 2Day 3Day 4Day 5Total
Akhil
Bimal
Chatur
Total Score1515161618
Day 2Day 3Day 4Day 5
1515.51617

clue 2 says,

The total score on Day 3 is the same as the total score on Day 4.

i.e., d3 = d4

And we know, d3 + d4 = 32

=> d3 = d4 = 16

Now using previous equations,

we know d2+ d3 = 31 => d2 = 15

and, d1 + d2 = 30 => d1 = 15

and , d4 + d5 = 34 => 18

Day 1Day 2Day 3Day 4Day 5Total
Akhil
Bimal
Chatur9
Total Score1515161618

Clue 1 says,

Chatur always scores in multiples of 3. His score on Day 2 is the unique highest score in the competition.

therefore, chatur score on day 2 will be a multiple of 3 and also unique highest

which can only be 9.

(as it is given that each participant randomly picks up a ball numbered between 1 and 9, therefore, the highest score can't be greater then 9.)

=> No other person scored 9 or more then 9 on 5 days.

Day 1Day 2Day 3Day 4Day 5Total
Akhil3
Bimal
Chatur39
Total Score1515161618

Continuing with Clue 1,

Chatur's minimum score is observed only on Day 1, and it matches Akhil's score on Day 4.

Now, we already know that his score is a multiple of 3

therefore, his minimum score will be 3.

And the same will be Akhil's score on day 4.

Day 1Day 2Day 3Day 4Day 5Total
Akhil3
Bimal7
Chatur3966630
Total Score1515161618

Also question says that Chatur has a unique minimum and maximum score.

which we found to be 3 and 9

So, the only multiple of 3 between them is 6, which will be his score on other days.

From which we can find Bimal's score on day 4 to be

Akhil + bimal + chatur = 16 (on day 4)

=> bimal = 16 - 6 - 3

=> bimal = 7

Day 1Day 2Day 3Day 4Day 5Total
Akhil53
Bimal57
Chatur3966630
Total Score1515161618
Ranks of participants on each day
Day 1Day 2Day 3Day 4Day 5
Akhil12233
Bimal23211
Chatur31122

From the second table we know, we see that the rank of Bimal and Akhil is the same on day 3, which is 2.

Hence, The score obtained by Akhil and Bimal is the same.

Let the score be x.

Therefore, 6+2x = 16

=> x = 5

Day 1Day 2Day 3Day 4Day 5Total
Akhil535/4
Bimal577/8
Chatur3966630
Total Score1515161618
Ranks of participants on each day
Day 1Day 2Day 3Day 4Day 5
Akhil12233
Bimal23211
Chatur31122

The rank of Chatur on Day 5 is 2, and the rank of Bimal is 1

which implies the score obtained by Bimal will be more than Chatur.

Chatur had score of 6, also we know that maximum score is 9

Therefore, Bimal's score on day 5 = 7/8

And accordingly subtracting both Chatur's and Bimal's score on day 5

we will get Akhil's score to be - 5/4

Day 1Day 2Day 3Day 4Day 5Total
Akhil7535/4
Bimal5577/8
Chatur3966630
Total Score1515161618
Ranks of participants on each day
Day 1Day 2Day 3Day 4Day 5
Akhil12233
Bimal23211
Chatur31122

Clue 3 says, Bimal's scores are the same on Day 1 and Day 3.

Hence, the score obtained by Bimal on Day 1 is 5

which implies The score obtained by Akhil is 7 on Day 1

Day 1Day 2Day 3Day 4Day 5Total
Akhil74/5535/423/24/25
Bimal52/1577/827/26/25
Chatur3966630
Total Score1515161618
Ranks of participants on each day
Day 1Day 2Day 3Day 4Day 5
Akhil12233
Bimal23211
Chatur31122

From Table 2, we can see that the rank of Bimal is 3 on Day 2, and the rank of Akhil is 2 on Day 2.

Hence, the score of Bimal will be lower than Akhil on Day 2.

Let the score of Akhil be a, and the score of Bimal be b.

Then 9+a+b = 15, and a > b

=> a+b =6, and a> b

Hence, the value of a can be 4/5, and the value of b can be 2/1.

Day 1Day 2Day 3Day 4Day 5Total
Akhil74/5535/423/24/25
Bimal52/1577/827/26/25
Chatur3966630
Total Score1515161618

Chatur attains the maximum possible score

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