IBPS PO Prelims 3 oct 2020 Questions and Answers Detailed Explanation
MOST IMPORTANT previous year question answers - 1 EXERCISES
Directions:
Study the following information carefully and answer the given questions.
25% of the boys and 60% of the girls from a college participated in an event. Total number of girls in the college is equal to the number of boys, who do not participate in the event.
The following question based on IBPS PO topic of previous year question answers
(a) 30%
(b) 35%
(c) 50%
(d) 80%
e) None of these
The correct answers to the above question in:
Answer: (d)
According to the question,
(100-25)% of Boys = Total number of girls
⇒ 75% of B= G
⇒ Boys : Girls = 4 : 3
Let number of Boys & girls respectively 4x , 3x
Required% = $\text"(60% of 3x - 25% of 4x)"/\text"25% of 4x" × 100$ = 80
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Read more ibps po prelims 3 oct 2020 Based Previous Year Questions and Answers
Question : 1
If the difference in the number of boys and girls, who participated in the event is 40, then the total number of boys and girls in the college is
a) 175
b) 210
c) 350
d) 420
e) None of these
Answer »Answer: (c)
According to the question,
(100-25)% of Boys = Total number of girls
⇒ 75% of B= G
⇒ Boys : Girls = 4 : 3
Let number of Boys & girls respectively 4x , 3x
⇒ 60% of 3x – 25% of 4x = 40
⇒ X= 50
Question : 2
A started a business with a certain capital. After 3 months A left the business and B joins the business and remains in business. If the ratio of the profitt at the end of the year is 5 : 6 and the initial investment of A is Rs. 6000, then the investment of B is
a) Rs. 1800
b) Rs. 2400
c) Rs. 3600
d) Rs. 4800
e) None of these
Answer »Answer: (b)
Let investment of B = Rs. x, then
According to question
(6000 × 3) : {x × (12 – 3)} = 5 : 6
⇒ 2000 : x = 5 : 6
⇒ x = 2400
Question : 3
The present age of B will be half of A's age 4 years hence and double of A's age 5 years ago, then what is the present age of B?
a) 6 years
b) 4 years
c) 8 years
d) 12 years
e) None of these
Answer »Answer: (a)
Let the present ages of A and B be a years and b years, then
According to question
b = $\text"(a+4)"/2$ = 2(a – 5)
⇒ (a + 4) = 4(a – 5)
⇒ (4a – a) = 4 × 5 + 4 = 24
⇒ 3a = 24
⇒ a = 8
Hence, the present age of B = b = 2(a – 5) = 2(8 – 5)
= 6 years.
Question : 4
A shopkeeper bought 80 pens is Rs. 400. He sold 40 pens at 60% profit and sold the remaining pens at a 20% profit. If he had sold all the pens at a 15% profit, how much less profit would he have made?
a) Rs. 65
b) Rs. 80
c) Rs. 100
d) Rs. 120
e) None of these
Answer »Answer: (c)
Cost of per pen= $400/80$
= 5 Rs/pen
Prot on 40 pens(at 60% prot)
= 5×40×60%= 120 Rs
Profit on remaining pens(at 20% profit)
= 5×40×20%= 40 Rs
Total profit on All the pens(at 15% profit)
= 5×80×15%=60
Required difference= (120+40)-60
=100 Rs.
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