Percentage Quiz for SBI PO, IBPS PO, SBI CLERK, IBPS CLERK, 2018

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Directions : Read the following questions carefully and choose the right answer.
1
Prerna decided to donate 15% of her salary to an orphanage. On the day of donation she changed her mind and donated Rs 2,896 which was 90% of what she had decided earlier. How much is Prerna’s salary (approx)?
» Explain it
C
Let Prena’s salary be Rs x.
 
Now, according to the question,
 
90% of 15% of x = 2896 
 
∴ x =  2896  R ≈ 21450
0.9 × 0.15

Hence, option (C) is correct.

2
Equal amounts are deposited in two banks each at 3.5% pa for 12 years and 8.5 years respectively. If the difference between their interests is Rs. 189.875 then what is the amount?
» Explain it
A
Let the amount be ‘x’

∴  x × 3.5 × 12  –  x × 3.5 × 8.5  = 189.875
100 100

42x – 29.75x = 18987.5
∴ x =  18987.5  = 1550
12.25

Hence, option (A) is correct.

3
In a Company of 50 Employees and 12 managers, each employee got sweets that are 25% of the total number of employees and each manager got sweets that are 30% of the total number of employees. Total number of sweets got by all the employees is what percent of total number of sweets got by all the managers?
» Explain it
B
Total number of sweets got by all the employees

= 50 ×  25  × 50 = 625
100

Total number of sweets got by all the managers
= 12 ×  30  × 50 = 180
100

Reqd % =  625  × 100 = 347.22%
180

Hence, option B is correct.
 
4
Ranjan earns 15% on an investment but loses 10% on another investment. If the ratio of two investments is 3:5, then find the combined loss percentage. 
» Explain it
A
Let the first investment be 3x and then second investment be 5x

  ( 3x ×  15  – 5x ×  10 )  
Combined loss % =  100 100  × 100
3x + 5x

  ( 45x  –  50x   )  
= 100 100  × 100
8x

( –  5x )  × 100
8x × 100

= –  5 % (loss).
8

Hence, option (A) is correct.

5
A shopkeeper wants to make a profit of 20% on an article after selling it, while he gives a cash discount of 20%. Further allows 4 more articles for free after purchase of one dozen articles to his premium customer. How much per cent above the cost price he must mark his article?
» Explain it
C
Let CP of 1 article = Rs. 100

CP of 16 articles = Rs. 1600

Now he is selling 4 articles for free after purchase of 12 articles. So, SP of 12 articles = 120% of CP of 16 articles

= 120% of 1600 = 1920

SP of 1 article = Rs.  1920  = Rs.160
12

MP of 1 article after 20% discount on SP
= 160 ×  100  = Rs. 200
80

Hence required percent = (200 – 100) × 100 = 100%

Therefore, option (C) is correct.