IBPS RRB PO Prelims 12 sep 2020 Questions and Answers Detailed Explanation
MOST IMPORTANT previous year question answers - 1 EXERCISES
Directions:
Read the following table carefully and answer the given questions.
In the table, data of number of members participating in an event from 6 sports clubs – A, B, C, D, E and F.
| Sports club | Total no. of members | % of members participated |
| A | 4000 | 65% |
| B | 9000 | 20% |
| C | 4800 | 25% |
| D | 5000 | 30% |
| E | 6000 | 35% |
| F | 6750 | 40% |
The following question based on IBPS RRB PO topic of previous year question answers
(a) 40%
(b) 60%
(c) 28%
(d) 35%
e) 55%
The correct answers to the above question in:
Answer: (b)
The number of members of sports club A, who did not participate in the event
= (100 – 65)% of 4000
= 35% of the 4000 = 1400
The number of members of sports club D, who did not participate in the event
= (100 – 30)% of 5000
= 70% of the 5000 = 3500
Hence, the required percent = $\text"3500 - 1400"/3500$ × 100 = 60%.
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Read more ibps rrb po prelims 12 sep 2020 Based Previous Year Questions and Answers
Question : 1
What is the average number of members not participated in the event from the sports clubs A, B, D, E and F?
a) 3990
b) 3610
c) 4060
d) 3570
e) 4010
Answer »Answer: (e)
The number of members of sports club A, who did not participate in the event
= (100 – 65)% of 4000
= 35% of the 4000 = 1400
The number of members of sports club B, who did not participate in the event
= (100 – 20)% of 9000 = 7200
The number of members of sports club D, who did not participate in the event
= (100 – 30)% of 5000 = 3500
The number of members of sports club E, who did not participate in the event
= (100 – 35)% of 6000 = 3900
The number of members of sports club F, who did not participate in the event
= (100 – 40)% of 6750 = 4050
Hence, the required average
= $\text"1400 + 7200 + 3500 + 3900 + 4050"/5$ = 4010.
Question : 2
What is the difference of the number of members participated in the event from the sports clubs B and C and the number of members not participated in the event from the sports clubs D and E?
a) 7400
b) 2400
c) 3600
d) 4400
e) 3000
Answer »Answer: (d)
The number of members of sports club B, who participated in the event
= 20% of 9000 = 1800
The number of members of sports club C, who participated in the event
= 25% of 4800 = 1200
The number of members of sports club D, who did not participate in the event
= (100 – 30)% of 5000 = 3500
The number of members of sports club E, who did not participate in the event
= (100 – 35)% of 6000 = 3900
then required difference = (3500 + 3900) – (1800 + 1200)
= 4400.
Question : 3
If the 30% of the members participated in the event from the sports club B played badminton and rest played Hockey, Cricket and Football in the ratio 2 : 4 : 3, then the number of members, who played Football is
a) 380
b) 420
c) 460
d) 480
e) 500
Answer »Answer: (b)
The number of members of sports club B, who participated in the event = 20% of 9000 = 1800
The number of members of sports club B, who played Badminton
= 30% of 1800 = 540
Hence, the number of members of sports club B, who played Football
= $3/\text"(2 + 4 + 3)"$ × (1800 – 540) = 420.
Question : 4
What is the ratio of the number of members of the sports clubs C and F, who did not participate in the event?
a) 4 : 5
b) 3 : 4
c) 5 : 9
d) 8 : 9
e) 5 : 3
Answer »Answer: (d)
The number of members of sports club C, who did not participate in the event
= (100 – 25)% of 4800 = 3600
The number of members of sports club F, who did not participate in the event
= (100 – 40)% of 6750 = 4050
Hence, the required ratio = 3600 : 4050
= 8 : 9
Directions:
What approximate value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)
Question : 5
$2.99/3.99$ x $3√{511.99}$ + 123.9% of 650.11 = ?
a) 600
b) 700
c) 750
d) 812
e) 1000
Answer »Answer: (d)
$3/4$ x 8 + 124% of 650 = x
6 + 806 = x
812 = x
Hence, the answer is D.
Question : 6
257.12 + 187 .99 × ? = (49.98)2 + 30.99
a) 8
b) 20
c) 24
d) 36
e) 12
Answer »Answer: (e)
257.12 + 187 .99 × ? = (49.98)2 + 30.99
⇒ 257 + 188 × ? = 2500 + 31
⇒ 188 × ? = 2274
⇒ x = 12
Hence, the answer is C.
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