The mean proportion of 169 and 144 is:

This question was previously asked in
SSC CGL 2022 Tier-I Official Paper (Held On : 01 Dec 2022 Shift 1)
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  1. 156
  2. 147
  3. 126
  4. 165

Answer (Detailed Solution Below)

Option 1 : 156
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Detailed Solution

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Given:

The mean proportion of 169 and 144

Concept used:

If A : B :: C : D then (B × C) = (A × D)

Calculation:

Let the mean proportion be Q.

The proportion becomes = 169 : Q :: Q : 144

​According to the concept,

(144 × 169) = (Q × Q)

⇒ Q2 = (144 × 169)

⇒ Q = 12 × 13

⇒ Q = 156

∴ The mean proportion of 169 and 144 is 156.

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