Averages & Ages — practice questions, page 3
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The average of 5 numbers is 40. When one number is removed, the average of the remaining 4 becomes…The average weight of 5 boxes on a truck is 42 kg. When one more box is loaded, the average…The sum of the present ages of A and B is 40 years. Five years ago, A was twice as old as B. Find…A is 5 years older than B. Three years from now, the sum of their ages will be 41 years. Find the…In a family of 4, the mean age is 30 years. When the grandmother comes to live with them, the mean…Nikhil's six unit-test scores average 72. When one of the tests is left out, the other five…In a coaching batch of 35 students the average age is 12 years. When the coach's age is added, the…A batsman has an average of 40 runs in 12 innings. How many runs must he score in the 13th innings…Six consecutive even numbers have a mean of 47. What is the smallest of them?The average age of 11 players of a team is 28 years. When the coach's age is included, the average…Five consecutive odd numbers add up to 135. What is the smallest of them?The 24 children in a dance class have an average age of 11 years. Adding their teacher's age…The average of 11 numbers is 50. The average of the first 6 numbers is 49 and the average of the…The present age of a mother is three times that of her daughter. After 12 years, the mother's age…Five years ago, a man's age was 7 times his son's age. At present, the man's age is 4 times his…The sum of the present ages of A and B is 60 years. Six years ago, A's age was three times B's…Four members of a family have an average weight of 55 kg. When a fifth member joins, the average…Nine rainfall readings have a mean of 40 mm. The first five readings average 38 mm and the last…The 24 players in a cricket squad have a mean age of 19 years. When the coach is counted as well,…Seven consecutive odd numbers have an average of 31. What is the smallest of them?The present age of a father is three times that of his son. After 5 years, the father will be 2.5…Six parcels at a courier counter in Kochi weigh 15 kg on average. One parcel of 25 kg is sent off.…Six parcels at a courier counter have an average weight of 15 kg. When one parcel is taken out,…24 students of a class have a mean weight of 40 kg. When their teacher's weight is also counted,…The average of 6 consecutive even numbers is 15. Find the largest of these numbers.
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