ExamCompetition Forum Question Papers Ask A Question Mock Test Learn & Earn Sign Up Login Menu



0 vote

 What is the least number to be subtracted from 11, 15, 21 and 30 each so that resultant numbers become proportional?

Asked on by | Votes 0 | Views: 550 | Tags: quantitative aptitude     | ratio and proportion     | Add Bounty

 What is the least number to be subtracted from 11, 15, 21 and 30 each so that resultant numbers become proportional?

A).  1

B). 2

C). 3

D). 4


Share on Facebook      Share on Whatsapp       Share on Twitter




1 answers

-3 vote
Answered by on | Votes -3 |

3



Let the least number to be subtracted be x, then 11 - x, 15 - x, 21 - x and 30 - x are in proportion.

<=> (11 - x) : (15 - x) = (21 - x) : (30 - x)

=> (11 - x)(30 - x) = (15 - x)(21 - x)

From the options, when x = 3

=> 8 * 27 = 12 * 18

Join Telegram Group




Answer This Question

Name:
Email:
Answer :
Sum of (5+2)
Submit: