The average age of a group of persons going for a picnic is 16 years. Twenty new persons with an average age of 15 years join the group on the spot due to which their average age becomes 15.5 years. The number of persons initially going for a picnic is
Subject: Mathematics Multiple Choice Quiz ( MCQ ) and Answer
The average of five numbers is 58. The average of the first two numbers is 48.5 and the average of the last two numbers is 53.5. What is the third number?
If the average marks of three batches of 55, 60, and 45 students respectively is 50, 55, and 60 then the average marks of all the students is?
Ten years ago, the ages of the members of a joint family of eight people added up to 231 years. Three years later, one member died at the age of 60 years and a child was born during the same year. After another three years, one more member died, again at 60, and a child was born during the same year. The current average of this eight-member joint family is nearest to
In a cricket eleven, the average age of eleven players is 28 years. Out of these, the average ages of three groups of three players each are 25 years, 28 years, and 30 years respectively. If in these groups, the captain and the youngest player are not included, and the captain is eleven years older than the youngest player. What is the age of the captain?
A school has 4 sections of Chemistry in Class X having 40, 35, 45 and 42 students. The mean marks obtained in Chemistry test are 50, 60, 55 and 45 respectively for the 4 sections. Determine the overall average of marks per student.
In a class there are 50 students. Their average weight is 45 kg. When a student leaves the class, the average is reduced by 100 g. Find the weight of the student who left the class.
The average of 11 results is 60. If the average of the first six results is 58 and that of the last six is 63, find the 6th result.
A shop for electronic goods is closed on Monday. The average daily sales for the remaining six days of the week is Rs.15,640 and the average sale on Tuesday to Saturday is Rs.14,124. The sales on Sunday are?
The average of 11 players in a cricket team is decreased by 2 months when two of them aged 17 years and 20 years are replaced by two new players. The average age of the new players is?
The average height of 35 girls in a class was calculated as 160 cm. It was later found that the height of one of the girls in the class was wrongly written as 144 cm, whereas her actual height was 104 cm. What is the actual average height of the girls in the class? (rounded off to 2 digits after decimal)
The average mark of a student in 4 subjects is 75. If the student obtained 80 marks in the fifth subject, then the new average is?
The speed of a railway engine is 42 km/hr when no compartment is attached and the reduction in speed is directly proportional to the square root of the number of compartments attached. If the speed of the train carried by this engine is 24 km/hr with 9 compartments attached, the maximum number of compartments that the engine can pull is?
A distance of 425 km separates two trains moving towards each other at a speed of 200 km/hr each. What will be the distance between them after 1 hr 30 min, if they reduce their speed by half, every half an hour?
Two boys A and B start at the same time to ride from Delhi to Meerut, 60 km away. A travels 4 km an hour slower than B, B reaches Meerut and at once turns back meeting A, 12 km from Meerut. A’s rate was?
The ratio of the speeds of a car, a train, and a bus is 5 : 9 : 4. The average speed of the car, the bus, and the train is 72 km/hr What is the average speed of the car and the train together?
A flight of Jet Airways from Delhi to Mumbai has an average speed of 700 km/hr without any stoppage … What is the average stoppage time per hour of a kingfisher flight if both planes fly at the same speed?
A thief is noticed by a policeman from a distance of 200 m. The thief starts running and the policeman chases him. The thief and the policeman run at the rate of 10 km and 11 km per hour respectively. What is the distance between them after 6 minutes?
The average speed of a bus is one-third of the speed of a train. The train covers 1125 km in 15 hours. How much distance will the bus cover in 36 minutes?
An airplane flies twice as fast as a train which covers 60 miles in 80 minutes. What distance will the airplane cover in 20 minutes?
Ramesh is walking at a speed of 10 kilometers per hour. After every kilometer, he takes rests for 5 minutes. The time taken to cover a distance of 5 kilometers Ramesh is?
A person wishes to reach his destination 90 km away in 3 hours … His average speed for the rest of the journey should be?