ChetanaSforum 5 Quantitative Aptitude Questions - Solved

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Below I have given few quantitative aptitude questions (solved) from ratios and proportions. Such questions can be expected on Wipro Placement Papers.

1. In what ratio must rice at Rs 9.30 per Kg be mixed with rice

at Rs 10.80 per Kg so that the mixture be worth Rs 10 per Kg?

Solution:

C.P of 1 Kg rice of 1st kind 930 p C.P of 1 Kg rice of 2n d kind 1080p

Mean Price 1000p

80 70

Required ratio=80:70 = 8:7

2. How much water must be added to 60 liters of milk at 11/2 liters

for Rs 20 so as to have a mixture worth Rs 10 2/3 a liter?

Solution: C.P of 1 lit of milk = 20*2/3 = 40/3

C.P of 1 lit of water 0 C.P of 1 lit of milk 40/3

Mean Price 32/3

8/3 32/3

Ratio of water and milk =8/3 : 32/3 = 1:4

Quantity of water to be added to 60 lit of milk =1/4*60=15 liters.

3. In what ratio must water to be mixed with milk to gain

20% by selling the mixture at cost price?

Solution:Let the C.P of milk be Re 1 per liter

Then S.P of 1 liter of mixture = Re.1

Gain obtained =20%.

Therefore C.P of 1 liter mixture = Rs(100/120*1) =5/6

C.P of 1 liter of water 0 C.P of 1 liter of milk1

Mean Price 5/6

1/6 5/6

Ratio of water and milk =1/6 : 5/6 = 1:5.

4. In what ratio must a grocer mix two varieties of pulses

costing Rs 15 and Rs 20 per Kg respectively so as to get

a mixture worth Rs 16.50 per Kg?

Solution:

Cost of 1 Kg pulses of 1 kind 15 Cost of 1 Kg pulses of 2nd kind 20

Mean Price Rs 16.50

3.50 1.50

Required ratio =3.50 : 1.50 = 35:15 = 7:3.