CAT 2020 Question Paper With Answers & Explanation
LRDI
Question Numbers (27 to 32): Answer the questions
on the basis of the information given below.
The Hi-Lo game is a four-player game played in six
rounds. In every round, each player chooses to bid Hi or
Lo. The bids are made simultaneously. If all four bid Hi,
then all four lose 1 point each. If three players bid Hi and
one bids Lo, then the players bidding Hi gain 1 point
each and the player bidding Lo loses 3 points. If two
players bid Hi and two bid Lo, then the players bidding
Hi gain 2 points each and the players bidding Lo lose 2
points each. If one player bids Hi and three bid Lo, then
the player bidding Hi gains 3 points and the players
bidding Lo lose 1 point each. If all four bid Lo, then all
four gain 1 point each.
Four players Arun, Bankim, Charu, and Dipak played
the Hi-Lo game. The following facts are known about
their game:
1. At the end of three rounds, Arun had scored 6 points,
Dipak had scored 2 points, Bankim and Charu had
scored -2 points each.
2. At the end of six rounds, Arun had scored 7 points,
Bankim and Dipak had scored -1 point each, and
Charu had scored -5 points.
3. Dipak’s score in the third round was less than his
score in the first round but was more than his score
in the second round.
4. In exactly two out of the six rounds, Arun was the
only player who bid Hi.
Q. 1 What were the bids by Arun, Bankim, Charu and
Dipak, respectively in the first round?
Question Numbers (33 to 38): Answer the questions
on the basis of the information given below.
A farmer had a rectangular land containing 205 trees.
He distributed that land among his four daughters – Abha,
Bina, Chitra and Dipti by dividing the land into twelve
plots along three rows (X, Y, Z) and four Columns (1, 2, 3, 4)
as shown in the figure below:
The plots in rows X, Y, Z contained mango, teak and
pine trees respectively. Each plot had trees in non-zero
multiples of 3 or 4 and none of the plots had the same
number of trees. Each daughter got an even number of
plots. In the figure, the number mentioned in top left
corner of a plot is the number of trees in that plot, while
the letter in the bottom right corner is the first letter of
the name of the daughter who got that plot (For example,
Abha got the plot in row Y and column 1 containing 21
trees). Some information in the figure got erased, but
the following is known:
1. Abha got 20 trees more than Chitra but 6 trees less
than Dipti.
2. The largest number of trees in a plot was 32, but it
was not with Abha.
3. The number of teak trees in Column 3 was double of
that in Column 2 but was half of that in Column 4.
4. Both Abha and Bina got a higher number of plots
than Dipti.
5. Only Bina, Chitra and Dipti got corner plots.
6. Dipti got two adjoining plots in the same row.
7. Bina was the only one who got a plot in each row
and each column.
8. Chitra and Dipti did not get plots which were adjacent
to each other (either in row / column / diagonal).
9. The number of mango trees was double the number
of teak trees.
Question Numbers (39 to 42): Answer the questions
on the basis of the information given below.
XYZ organization got into the business of delivering
groceries to home at the beginning of the last month.
They have a two-day delivery promise. However, their
deliveries are unreliable. An order booked on a particular
day may be delivered the next day or the day after. If the
order is not delivered at the end of two days, then the
order is declared as lost at the end of the second day.
XYZ then does not deliver the order, but informs the
customer, marks the order as lost, returns the payment
and pays a penalty for non-delivery.
The following table provides details about the operations
of XYZ for a week of the last month. The first column
gives the date, the second gives the cumulative number
of orders that were booked up to and including that day.
The third column represents the number of orders
delivered on that day. The last column gives the
cumulative number of orders that were lost up to and
including that day.
It is known that the numbers of orders that were booked
on the 11th, 12th, and 13th of the last month that took
two days to deliver were 4, 6, and 8 respectively.
Q. 13 Among the following days, the largest fraction of
orders booked on which day was lost?
Q. 15 The delivery ratio for a given day is defined as the
ratio of the number of orders booked on that day
which are delivered on the next day to the number of
orders booked on that day which are delivered on
the second day after booking. On which of the
following days, was the delivery ratio the highest?
Q. 16 The average time taken to deliver orders booked on
a particular day is computed as follows. Let the
number of orders delivered the next day be x and the
number of orders delivered the day after be y. Then
the average time to deliver order is (x+2y)/(x+y). On
which of the following days was the average time
taken to deliver orders booked the least?
Question Numbers (43 to 46): Answer the questions
on the basis of the information given below.
Sixteen patients in a hospital must undergo a blood test
for a disease. It is known that exactly one of them has
the disease. The hospital has only eight testing kits and
has decided to pool blood samples of patients into eight
vials for the tests. The patients are numbered 1 through
16, and the vials are labelled A, B, C, D, E, F, G, and H.
The following table shows the vials into which each
patient’s blood sample is distributed.
If a patient has the disease, then each vial containing
his/her blood sample will test positive. If a vial tests
positive, one of the patients whose blood samples were
mixed in the vial has the disease. If a vial tests negative,
then none of the patients whose blood samples were
mixed in the vial has the disease.
Q. 17 Suppose vial C tests positive and vials A, E and H
test negative. Which patient has the disease?
Q. 18 Suppose vial A tests positive and vials D and G test
negative. Which of the following vials should we test
next to identify the patient with the disease?
Q. 20 Suppose one of the lab assistants accidentally mixed
two patients' blood samples before they were
distributed to the vials. Which of the following correctly
represents the set of all possible numbers of positive
test results out of the eight vials?
Question Numbers (47 to 50): Answer the questions
on the basis of the information given below.
A survey of 600 schools in India was conducted to gather
information about their online teaching learning processes
(OTLP). The following four facilities were studied.
F1: Own software for OTLP
F2: Trained teachers for OTLP
F3: Training materials for OTLP
F4: All students having Laptops
The following observations were summarized from the
survey.
1. 80 schools did not have any of the four facilities –
F1, F2, F3, F4.
2. 40 schools had all four facilities.
3. The number of schools with only F1, only F2, only
F3, and only F4 was 25, 30, 26 and 20 respectively.
4. The number of schools with exactly three of the
facilities was the same irrespective of which three
were considered.
5. 313 schools had F2.
6. 26 schools had only F2 and F3 (but neither F1 nor
F4).
7. Among the schools having F4, 24 had only F3, and
45 had only F2.
8. 162 schools had both F1 and F2.
9. The number of schools having F1 was the same as
the number of schools having F4.
Q. 21 What was the total number of schools having exactly
three of the four facilities?