CA Foundation · Quantitative Aptitude · Ratio and Proportion, Indices and Logarithms
If p/q = r/s = 3/4, which of the following equals (p + r)/(q + s)?
The value is 3/4. When ratios are equal, the sum of the antecedents divided by the sum of the consequents equals the common ratio. For example, p=3, q=4, r=6, s=8 give 9/12 = 3/4.
- A3/7
- B3/4Correct
- C7/4
- D4/3
Explanation
If the ratios are equal, the sum of the antecedents over the sum of the consequents equals the common ratio. Take p=3, q=4, r=6, s=8: (3+6)/(4+8)=9/12=3/4. Option A wrongly adds the numerator and denominator of the ratio.
Did you get it right without looking?
One question tells you little. A timed set on Ratio and Proportion, Indices and Logarithms shows your real accuracy, how long you take and where you lose marks.
More Ratio and Proportion, Indices and Logarithms questions
- If x varies directly as y and inversely as z, and x = 6 when y = 4 and z = 2, then the value of x when y = 9 and z = 6 is:
- The value of log₁₀ 5 + log₁₀ 20 is:
- If log₂ x = a, log₄ y = a and x, y > 0, with a ≠ 0, then the relation between x and y is:
- If the sub-duplicate ratio of x : 25 is equal to 3 : 5, then x equals:
- The value of ln e⁵ − ln e² is:
- The mean proportional between 4 and 36 is: