Ratio And Proportion Mcq Model Questions & Answers, Practice Test for ibps po mains 2024 2025
ibps po mains 2024 2025 SYLLABUS WISE SUBJECTS MCQs
Number System
Simplification
Ratio & Proportion
Percentage
The ratio of the number of boys and girls in a school is 2 : 5. If there was 350 students in the school, find the number of girls in the school.
Answer: (b)
Number of girls = ${5}/{2 + 5}$ × 350 = 250
Rs 750 is distributed among A, B and C such that A's share : B's share = 2 : 3 and B's share: C's share = 6 : 5. The share of A is,
Answer: (b)
Since, A : B = 2 : 3 and B : C = 6 : 5
∴ A : B : C = 4 : 6 : 5
Then, A's share = ${4}/{4 + 6 + 5}$ × 750 = Rs 200
Two vessels are full with milk and water mixed in the ratio 1 : 3 and 3 : 5 respectively. If both are mixed in the ratio 3 : 2, what is the ratio of milk and water in the new mixture ?
Answer: (d)
By alligation method,
∴ ${3/8 - x}/{x - 1/4} = 3/2$
⇒$3/4 - 2x = 3x - 3/4$
⇒5x = $6/4 = 3/2$
∴ x = $3/{10}$
A photograph measuring $2{{1"}/2} × 1{{7"}/8}$ is to be enlarged so that the length will be 4". How many inches will the enlarged breadth be ?
Answer: (b)
Let enlarged breadth be x inches.
Then, $5/2 : 4 : : {15}/8$ : x
⇒ $5/2$ x = 4 × ${15}/{8}$ ⇒ x = 3inches
A, B and C start a business each investing Rs.20,000. After 5 months A withdrew `5000, B withdrew Rs.4000 and C invests Rs.6000 more. At the end of the year, a total profit of Rs.69,900 was recorded. Find the share of B.
Answer: (a)
Ratio of the capitals of A, B and C
= 20000 × 5 + 15000 × 7 : 20000 × 5 + 16000 × 7 : 20000 × 5 + 26000 × 7
= 205000 : 212000 : 282000 = 205 : 212 : 282.
B's share = Rs.$(69900 × {{212}/{699}})$ = Rs.21,200
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