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The average mass of 3 boys is 64 kg. If the total mass of 2 of them is 119 kg, how heavy is the third boy?
  • a)
    36 kg
  • b)
    73 kg
  • c)
    160 kg
  • d)
    192 kg 
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
The average mass of 3 boys is 64 kg. If the total mass of 2 of them is...
Given information:
- Average mass of 3 boys = 64 kg
- Total mass of 2 boys = 119 kg

To find: Mass of the third boy

Solution:
Let's assume the mass of the third boy as x kg.

We know that the average mass of 3 boys is 64 kg, which means the total mass of all 3 boys would be:

Total mass of 3 boys = Average mass of 3 boys × Number of boys
Total mass of 3 boys = 64 × 3
Total mass of 3 boys = 192 kg

Now, we also know that the total mass of 2 boys is 119 kg. So, we can find the mass of the third boy by subtracting the total mass of 2 boys from the total mass of 3 boys:

Mass of the third boy = Total mass of 3 boys - Total mass of 2 boys
Mass of the third boy = 192 - 119
Mass of the third boy = 73 kg

Therefore, the mass of the third boy is 73 kg.

Answer: Option B) 73 kg
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Community Answer
The average mass of 3 boys is 64 kg. If the total mass of 2 of them is...
73 kg
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