Averages & Ages — practice questions, page 10
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QuestionGroup X has 5 men whose average age is 32 years and group Y has 5 men whose average age is 26…QuestionThe average weight of the 8 members of a rowing crew is 72 kg. Two members weighing 78 kg and 66…QuestionA father's age today is a two-digit number, and his son's age today is that same number with its…QuestionThree years ago Meena's father was seven times as old as Meena. Nine years from now he will be…QuestionSix years ago Nandini's aunt was five times as old as Nandini. Six years from now the aunt will be…QuestionTwelve years from now a mother will be twice as old as her daughter. Today the two ages together…QuestionEight numbers average 27. Two of them, 19 and 35, are taken out and two different numbers are put…QuestionEvery number in a list is replaced by 100 minus that number. If the average of the original list…QuestionA set of 9 numbers averages 50. The first number is then increased by 6, the second by 12, the…QuestionOn the five working days of a week a branch library issued 42, 56, 38, 61 and 53 books. On how…QuestionSeven donations were received at a village school: ₹100, ₹200, ₹300, ₹400, ₹500, ₹600 and ₹4,900.…QuestionAt a showroom the average price of the scooters on display is ₹72,000 and the average price of the…QuestionOf the 15 stalls at a district fair, 4 pay a daily rent of ₹1,200 each and 6 pay ₹900 each. The…QuestionThe ages of five sisters go up in steps of 3 years, each sister being 3 years older than the next…QuestionThe average age of the 5 players in a carrom team is 24 years. The eldest is 6 years above the…QuestionSeven numbers have an average of 24. The largest of them, 42, is written down once more so that…QuestionA group of students scored 448 marks between them in a test, and their average worked out to an…QuestionAcross 30 readings the average is 18. One of the readings is then corrected to 42 and the average…QuestionThe midday temperature at a hill station on five days was 4°C, -2°C, 0°C, 6°C and -3°C. What was…QuestionThe average age of the 9 people in a reading circle does not change when one of them, Kavita,…QuestionA diploma student scored 72 in a paper carrying 4 credits, 60 in a paper carrying 3 credits and 84…QuestionA community music club has 24 members whose average age is 15 years. Four members aged 20, 19, 17…QuestionAfter 10 innings a batter has a certain average. In the 11th innings he scores 96 runs, and this…QuestionA panel has 6 members. The chairperson's age is twice the average age of the other five members,…QuestionThe average age of the 40 people seated in a hall is 32 years. The 10 people in the front row are…
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