If  and 6a + 11b = 79 then a = 

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TSPSC VRO 2018 Official Paper
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  1. 4
  2. 5
  3. 6
  4. 8

Answer (Detailed Solution Below)

Option 1 : 4
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TSPSC VRO: General Knowledge (Mock Test)
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Detailed Solution

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Given:

a/b = 0.8

6a + 11b = 79

Formula used:

a = 0.8b

Calculation:

Substituting a = 0.8b in 6a + 11b = 79:

⇒ 6(0.8b) + 11b = 79

⇒ 4.8b + 11b = 79

⇒ 15.8b = 79

⇒ b = 79 / 15.8

⇒ b = 5

Now, a = 0.8 × 5

⇒ a = 4

∴ The value of a is 4.

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