Aptitude - balls

GeekInterview.com > Placement Papers > TCS > Aptitude

Go To First | Previous Question | Next Question

Aptitude | Question 141 of 149

balls

A sporting goods store ordered an equal number of white and yellow balls.The tennis ball company delivered 45 extra white balls,making the ratio of white balls to yellow balls 1/5 :1/6
how many white balls did the store originally order for?
a)450 b)270 c)225 d)none of these

Total Answers and Comments: 5

Last Update: November 02, 2009 Asked by: chandradeepika

Sponsored Links

Best Rated Answer

—

Submitted by: SpandanaMohan

option : c is the answer

Let the initial number of white and yellow balls be 'x'...Tennis ball company delivered 45 extra white balls..therefore the number of white balls is x+45...and the new ratio of white balls and yellow balls is 1/5:1/6..remiving the rational form...we get 6:5 and this is equal to x+45:x ratio...

                     x+45             6
                     -------   =      ---   => 5x+225=6x => x=225
                        x                5
Therefore store originally order for 225 balls

Above answer was rated as good by the following members:
rajintouch, SURAJTHEGREAT

May 29, 2008 03:40:26

SpandanaMohan

Member Since: January 2008 Contribution: 12

RE: balls

option : c is the answer

Let the initial number of white and yellow balls be 'x'...Tennis ball company delivered 45 extra white balls..therefore the number of white balls is x+45...and the new ratio of white balls and yellow balls is 1/5:1/6..remiving the rational form...we get 6:5 and this is equal to x+45:x ratio...

x+45 6
------- --- > 5x+225 6x > x 225
x 5
Therefore store originally order for 225 balls

Is this answer useful? Yes | No

2 1

Overall Rating: +1

June 02, 2008 15:52:51

anu1985

Member Since: May 2008 Contribution: 11

RE: balls

225

Is this answer useful? Yes | No

1 1

Overall Rating: -N/A-

June 20, 2008 13:39:02

mehulgogri

Member Since: June 2008 Contribution: 1

RE: balls

According to me the Answer is 270....
x-white balls y -yellow balls

x y

x+45/5 y/6

solve above 2 eqs

x -270 balls cannot be negative....

Is this answer useful? Yes | No

0 1

Overall Rating: -1

March 02, 2009 10:50:40

SURAJTHEGREAT

Member Since: March 2009 Contribution: 22

RE: balls

According to me answer is 225 bcoz the given ratio is 0.2:0.1666 Simplifying we get 1.2:1 (that is there is 1 yellow ball for 1.2 white ball) By trial and error method by substituting the given choices 225 is THE most
appropriate. However it took 3-4 min to solve. Friends come with an alternative method which consumes less time.

Is this answer useful? Yes | No

November 02, 2009 04:10:15

mus.shah

Member Since: October 2009 Contribution: 3

RE: balls

(1/5-1/6)*x 45
after solving
x 1350;
No of yellow balls (1/6)*x 225
i.e No of white balls (1/5)*x 270
and the diff is 270-225 45
so answer is 270 white balls

Is this answer useful? Yes | No

Go To Top

User Name		Remember Me?
Password

Question Bank