IBPS RRB clerk 19 sep 2020 Questions and Answers Detailed Explanation
MOST IMPORTANT previous year question answers - 1 EXERCISES
Directions:
Read the data carefully and answer the questions.
The table given below shows the data of the number of clothes dry cleaned by four different shops - L, M, N and O on the five working days - Monday, Tuesday, Wednesday, Thursday and Friday.
| Shop/Days | Monday | Tuesday | Wednesday | Thursday | Friday |
| L | 50 | 60 | 85 | 25 | 110 |
| M | 80 | 75 | 95 | 120 | 105 |
| N | 100 | 55 | 35 | 60 | 45 |
| O | 40 | 90 | 60 | 115 | 70 |
The following question based on IBPS RRB Clerk topic of previous year question answers
(a) 0
(b) 1
(c) 2
(d) 3
e) Cannot be determined
The correct answers to the above question in:
Answer: (b)
Number of clothes dry cleaned by L on all the days put together
= 50 + 60 + 85 + 25 + 110 = 330
Similarly, for all the shop's total number of clothes dry cleaned on all the days is calculated and it is shown in the table below:
| Shop/Days | Monday | Tuesday | Wednesday | Thursday | Friday | Total |
| L | 50 | 60 | 85 | 25 | 110 | 330 |
| M | 80 | 75 | 95 | 120 | 105 | 475 |
| N | 100 | 55 | 35 | 60 | 45 | 295 |
| D | 40 | 90 | 60 | 115 | 70 | 375 |
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Read more ibps rrb clerk prelims 19 sep 2020 Based Previous Year Questions and Answers
Question : 1
Price of an article is marked up 50% above the cost price. If the discount offered in the article is Rs. 50 and the profit earned is also Rs. 50, what is the marked price of the article?
a) Rs. 200
b) Rs. 240
c) Rs. 300
d) Rs. 450
e) Rs. 600
Answer »Answer: (c)
Let the cost price of the article = Rs. 100x, then
Marked price of the article = 100x + 50% of 100x = Rs. 150x
The selling price of the article = Rs. (150x – 50)
According to question
Profit = SP – CP
50 = (150x – 50) – 100x
⇒ 50 = 50x – 50
⇒ 50x = 100
⇒ x = 2
Hence, the marked price of the article = Rs. 150x
= 150 × 2
= Rs. 300.
Question : 2
A boat travels upstream at the speed of 10 km/hr for t hours and downstream at the speed of 14 km/hr for 6 hours. If the distance travelled in downstream direction is 44 km more than that in upstream direction, then what is the value of t?
a) 7
b) 2
c) 3
d) 4
e) 6
Answer »Answer: (d)
Distance = Speed × Time
The distance travelled in downstream direction
= 14 × 6 = 84 km
The distance travelled in upstream direction
= 10 × t = 10t km
According to question
84 – 10t = 44
⇒ 10t = 84 – 44 = 40
⇒ t = $40/10$ = 4
Question : 3
A and B start a business by investing Rs. X and Rs. (X + 800) respectively. After 1 year, A earned a profit of Rs. 3200 out of the total profit of Rs. 6800, then what is the value of X?
a) 3200
b) 4000
c) 6400
d) 7200
e) 8000
Answer »Answer: (c)
As both A and B invested for the same time period, then
The ratio of their profit = Ratio of their investment
$X/3200 = \text"X + 800"/\text"6800 - 3200"$
$X/3200 = \text"X + 800"/\text"3600"$
⇒ 9X = 8(X + 800)
⇒ X = 8 × 800 = 6400
Question : 4
Which of the following days had the most number of clothes dry cleaned by all the shops together?
a) Monday
b) Tuesday
c) Wednesday
d) Thursday
e) Friday
Answer »Answer: (e)
Total number of clothes dry cleaned by all the shops together on Monday
= 50 + 80 + 100 + 40 = 270
Similarly, for all the day's total number of clothes dry cleaned by all the shops is calculated and it is shown in the table below:
| Shop/Days | Monday | Tuesday | Wednesday | Thursday | Friday |
| L | 50 | 60 | 85 | 25 | 110 |
| M | 80 | 75 | 95 | 120 | 105 |
| N | 100 | 55 | 35 | 60 | 45 |
| D | 40 | 90 | 60 | 115 | 70 |
The most number of clothes were dry cleaned on Friday. Hence, the answer is option E.
Question : 5
The sum of the number of clothes dry cleaned by N on Tuesday, Wednesday and Thursday is what percentage of the clothes dry cleaned by O on all the days?
a) 30%
b) 40%
c) 50%
d) 55%
e) 60%
Answer »Answer: (b)
Sum of the number of clothes dry cleaned by N on Tuesday, Wednesday and Thursday
= 55 + 35 + 60 = 150
Clothes dry cleaned by O on all the days
= 40 + 90 + 60 + 115 + 70
= 375
Required percentage = $150/375$ × 100 = 40 %
Hence, the answer is option B.
Question : 6
What is the difference between the sum of the number of clothes dry cleaned by O on Monday and Thursday and the difference of the number of clothes cleaned by N on Monday and Wednesday?
a) 80
b) 70
c) 60
d) 90
e) 100
Answer »Answer: (d)
Sum of the number of clothes dry cleaned by O on Monday and Thursday
= 40 + 115 = 155
The difference between the number of clothes cleaned by N on Monday and Wednesday
= 100 – 35 = 65
Required difference = 155 – 65 = 90 Hence, the answer is option D
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