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Quantitative Aptitude

RATIO AND PROPORTION MCQs

Ratio & Proportion, Ratio, Proportion

Total Questions : 895 | Page 90 of 90 pages
Question 891. In a bag, there are coins of 25 p, 10 p and 5 p in the ratio of 1 : 2 : 3. If there is Rs. 30 in all, how many 5 p coins are there?
  1.    50
  2.    100
  3.    150
  4.    200
 Discuss Question
Answer: Option C. -> 150
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 892. Two numbers are respectively 20% and 50% more than a third number. The ratio of the two numbers is :__________?
  1.    2 : 5
  2.    3 : 5
  3.    4 : 5
  4.    6 : 7
 Discuss Question
Answer: Option C. -> 4 : 5
LET THE THIRD NUMBER BE X.
THEN, FIRST NUMBER = 120% OF X = 120X/100 = 6X/5 SECOND NUMBET = 150% OF X = 150X/100 = 3X/2 RATIO OF FIRST TWO NUMBERS = 6X/5 : 3X/2 =12X : 15X = 4 : 5.
Question 893. A surn of money is to be distributed among A, B, C, D in the proportion of 5 : 2 : 4 : 3. If C gets Rs. 1000 more than D, what is B’s share ?
  1.    Rs. 500
  2.    Rs. 1500
  3.    Rs. 2000
  4.    None of these
 Discuss Question
Answer: Option C. -> Rs. 2000
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 894. The ratio of the number of boys and girls in a college is 7 : 8. If the percentage iikcrease in the number of boys and girls be 20% and 10% respectively, what will be the new ratio ?
  1.    8 : 9
  2.    17 : 18
  3.    21 : 22
  4.    Cannot be determined
 Discuss Question
Answer: Option C. -> 21 : 22
ORIGINALLY, LET THE NUMBER OF BOYS AND GIRLS IN THE COLLEGE BE 7X AND 8X RESPECTIVELY. THEIR INCREASED NUMBER IS (120% OF 7X) AND (110% OF 8X), I . E . ( 120/100 X 7X ) AND ( 110/100 X 8X ) I . E . 42X/5 AND 44X/5 REQUIRED RATIO = 42X/5 : 44X/5 = 21 : 22
Question 895. The sum of three numbers is 98. If the ratio of the first to the second is 2 : 3 and that of the second to the third is 5 : 8, then the second number is :__________?
  1.    20
  2.    30
  3.    48
  4.    58
 Discuss Question
Answer: Option B. -> 30
LET THE THREE PARTS BE A, B, C THEN,
A : B = 2 : 3 AND B : C = 5 : 8 (5 X 3/5 ) : (8 X 3/5 ) = 3 : 24/5
A:B:C= 2 : 3 : 24/5 10:15:24
B = (98 X 15/49 ) = 30.

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