Quantitative Ability Questions
December 9th, 2009 Posted in Quantitative Ability
Quantitative Ability Questions:
1. A shop has 3 types of candies costing Rs. 1, Rs. 2 and Rs. 3. Neha has Rs. 24 and wants to buy exactly 12 candies comprising at least one of each kind. In how many different ways can she buy candies with all her money?
a) 5
b) 7
c) 9
d) 8
e) 6
2. Two barrels A and C contain alcohol and water in the ratio 1:a and 1:c , respectively. Equal quantity of mixtures from barrels A and C are mixed to get a mixture with alcohol and water in the ratio 1:b , Where b is the arithmetic mean of a and c . What can be the value of a + b + c If a, b and c are integers.
a) 14
b) 10
c) 15
d) 8
e) 17
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December 9th, 2009 at 11:40 pm
1) a.. easy to solve
2) c
because addition sud be a multiple of 3
December 9th, 2009 at 11:55 pm
yes…
1.a
2.c..
December 9th, 2009 at 11:56 pm
1. A.
EXPLANATION:-
as y hav to bye at least one candy from each type
so you have Rs 18 to bye 9 candy with different combination.
Now x+2y+3*(9-x-y)=18 (Say x and y no. of candy with Rs 1 AND 2 RESPECTIVELY)
or 2x+y=9
or y=9-2x
from the equation
x can hold 0,1,2,3 and 4.
so Ans = 5=A
2. C.
Explanation:-
As a,b,c are in AP,
so its a+c=2b
so a+b+c=3b
so ans is multiple of 3.
So answer is 15 (C)
December 10th, 2009 at 12:04 am
explanation..
x+2y+3z= 24……………..(1)
x+y+z=12…………………(2)
sustituting value of x in 2 we get..
y+2z=12
The possible solutions of x,y and z are
(5,2,5),(4,4,4),(3,6,3),(2,8,2),(1,10,1)
2nd one..
by taking b=(a+c)/2 in the equations we get c=a.
So a+b+c = 3/2(a+c) = 3a= 3c
From options only c is divisible by 3.
December 10th, 2009 at 4:17 am
1. (b)
x+2y+3z=24 (i)
x+y+z=12 (ii)
From (i) and (ii)
y+2z=12
Thus, (y,z) takes values (0,6),(2,5),(4,4),(6,3),(8,2),(10,1),(12,0)
2. (c)
a+b+c
=a+[(a+c)/2]+c
=3(a+b)/2
=3b
b is a valid interger
Hence, 3 and b are factors of the answers.
Thus, 15
December 10th, 2009 at 7:53 am
Hi Govind and Sumendha,
I think u guys forgot to consider the condition that each candy shoud be atleast one.So answer is 5 not 7 for question no. 1.
December 11th, 2009 at 11:08 pm
December 23rd, 2009 at 4:23 am
1.c
2.c
January 2nd, 2010 at 10:58 am
I agree completely, its no wonder people just dont get it.
April 3rd, 2010 at 9:14 pm
I think it’s funny that she does her hair in the nude.