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Question

The following ratios are given:

\(a : b = 2 : 3\)

\(b : c = 4 : 5\)

\(c : d = 3 : 2\)

\(d : e = 5 : 4\)

What is the value of the ratio a : e?

This question was previously asked in
RRB NTPC 2025 Under Graduate CBT 1 Question Paper PDF (20-Jun-2026) (Shift 3)
The correct answer is

1 : 1

The combined ratio \(a:e\) is obtained by multiplying all the given ratios together:

\(\frac{a}{e} = \frac{a}{b} \times \frac{b}{c} \times \frac{c}{d} \times \frac{d}{e} = \frac{2}{3} \times \frac{4}{5} \times \frac{3}{2} \times \frac{5}{4}\).

Simplifying, \(\frac{2 \times 4 \times 3 \times 5}{3 \times 5 \times 2 \times 4} = 1\).

So \(a:e = 1:1\).

Hence, the ratio a : e is 1 : 1.

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Similar Questions

  1. What is the compound ratio of $45 : 75$, $3 : 5$, $51 : 68$ and $256 : 81$?
  2. If \(a:b = 12:13\) and \(b:c = 4:5\), what is \(a:c\)?


Important Questions from Compound Ratios

  1. The sum of three numbers is 280. If the ratio between the first and second numbers is 2 : 3 and the ratio between second and third numbers is 4 : 5, find the second number.

  2. When x is subtracted from each of the numbers 54, 49, 22 and 21, the numbers so obtained are in proportion. The ratio of (8x - 25) to (7x - 26) is:

  3. The train fare, bus fare and air fare between 2 places are in the ratio 5 : 8 : 12, the number of passenger travelled by them is in the ratio 3 : 4 : 5 and the total fare collected on a particular day for these modes of transportation for a single trip is Rs. 1,07,000. Find the fare collected from the air passengers.

  4. A person carries Rs. 165/ - in the form of currency notes of denominations Rs. 5, Rs. 10 & Rs. 20 in the ratio of 3 : 2 : 1. What is the value of currency notes of Rs. 20 denomination?

  5. If a: b = 5: 3, then (a³-b³): (a³+b³) = ?

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