Subject: General Aptitude · Chapter: Ratio and Proportion · Exam: · Marks: · Difficulty:
Three numbers A, B and C are in the ratio 1 : 2 :
Answer
SELF-PRACTICE — the source book printed no answer.
Nothing is invented here, so this question has no answer on record.
Explanation
Let A = x, B = 2x, C = 3x. Then, = 600 3 ⇒ 2x = 600 ⇒ x = 300. So, A = 300, B = 600, C = 900. New value of A = 110% of 300 = 330. New value of B = 80% of 600 = 480. New average = 105% of 600 = 630. New value of C = (630 × 3) – (330 + 480) = 1080. \ Increase in value of C = (1080 – 900) = 180.
Explanation as extracted from the printed page; notation may be imperfect.