- A54
- B60
- C56
- D50
Step-by-Step Solution
First six sum = 294, last six sum = 312, total of all 11 = 550. The sixth number is counted in both, so it = 294 + 312 − 550 = 56.
Answer: C) 56
The average of 11 numbers is 50. The average of the first six is 49 and the average of the last six is 52. Find the sixth number.
Competition practiceAverages & Ages
Master this topic in 30 minutes a day.
Don't just memorise the answer — build a daily practice habit.
Practice 5 Similar Questions Free →All Averages & Ages practice questions
More Averages & Ages practice
The present age of a father is three times that of his son. After 12 years, the father's…Sushma is 28 years older than her daughter. In 4 years she will be three times as old as…The sum of the present ages of a mother and her daughter is 60 years. Six years ago the…The mean weight of 8 boxes is 25 kg. If a 39 kg box is removed, what is the mean weight…Four cousins have an average age of 22 years. When their uncle's son joins them, the…