The ratio of the weight of Ram, Shyam, and Mohan is 7 : 8 : 5 respectively. The average weight of Ram, Shyam, and Mohan is 80 kg. What is the average weight of Ram and Shyam?
Show answer & explanation
Correct answer: C
Explanation
The correct answer is Option 3 i.e. 90 kg.
The ratio of the weight of Ram, Shyam and Mohan = 7x : 8x : 5x
The average weight of Ram, Shyam, and Mohan is 80 kg
We know that,
Average = Sum of observations/Number of observations
According to the question,
⇒ (7x + 8x + 5x)/3 = 80
⇒ x = 12
The average weight of Ram and Shyam = (7x + 8x)/2 = 15 × 12/2 = 90 kg