InfyTQ Percentage Quiz 3

Let the total no. of chocolates be X
As she ate 80% so now she’s left with 20% of them = 4
That is 4 = 20*X/100
Therefore X = 400/20 =20 Chocolates.
Hence total no. of chocolates that Nancy got from her father = 20

As per the question 10/100*X = Y
Then y% ie Y/100*20 = ?
Here Y= 10X/100/100*20
=10X/100*1/100*20 = 2X/100 = 2% of X

Hence Y is 2% of X
Therefore option A is the correct one.

It is clear that the pulp content is both grapes and raisins is same, and only
water content is variable.

So, Pulp in grapes = pulp in raisins
Given that Grapes have 80% water hence 20% is the pulp.and the weight of
fresh grapes is 50 Kg
And Raisins have 40% pulp (mentioned 60% of water gets evaporated). Let the
weight of raisins be X kg.
We can also write that
20/100*50= 40/100*x
On solving the above equation 10 = 4/10X therefore X = 25 Kg.
Hence Sam will get 25 kg of raisins from 50 k grapes.
Therefore option c is the correct one.

Explanation :  e ( 1+ r/ 100 )ⁿ= 966306

e (1 +10/100 )⁵ = 966306
e ( 1.1)⁵ = 966306
e = 966306 / (1.1)⁵

e = 600,000

Present value of the car = Rs 2,00,000
Value after 4 years = 2,00,000*9/10*9/10*9/10*9/10
= Rs 1,31,220
Hence value of his car after 4 years will be Rs 1,31,220
Therefore option A is the correct one.

Let the maximum marks be X
From the question, it is clear that passing marks is
75+20= 95 = 38% of maximum marks
95= 38/100X
Therefore X = 9500/38= 250

Hence the maximum marks = 250 which is why option B is the correct one.

Let the number be 56
Mistake done = 56*7/8 = 49
Correct multiplication was = 56*8/7 = 64
Difference in value = 64-49 = 15
Therefore % change = Difference in value /correct value *100
15/64*100=23.43%

Let the salary be 100
She spent 20% of this on shopping= 20/100*100= 20

Remaining Salary= 100-20= 80

Salary spent on groceries = 30/100*80= 24

Remaining salary = 80-24= 56
Since 50% of the remaining salary was used for paying the loan installment
50/100*56= 28
Hence amount left= 56-28= 28

Hence % of salary saved = Saved amount/total salary*100= 28/100*100= 28%
Therefore option D is the correct one

Lets assume that sensex started at 100 points initially.
Then it raised by 20% = 100*20/100 = 20 points
So it came up to 100+20= 120 points
But came down at the end of the day by 15% = 120*15/100= 18 points
Which = 120-18= 102 points.
Therefore % change in sensex = 102-100= 2 points
Or % change = Change/Original value*100 = 2/100*100= 2%
Hence option A is the correct one.

Let the salary be 100
Salary spent on charity= 10*100/100=10
Amount Remaining = 100-10= 90. 20% of this is spent on groceries

Ie= 90*20/100= 18
Remaining amount after spending on groceries= 90-18= 72
10% of this is deposited in savings= 72*10/100= 7.2
Amount after depositing in saving a/c= 72-7.2= 64.8
20% of this is spent on clothing= 64.8*20/100= 12.96
Amount after clothing exp.= 64.8-12.96= 51.84
Hence Final Amount after all the above deductions= 51.84
Percentage of salary given to parents = 51.84/100*100= 51.84%
Therefore option A is the correct one.