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1. A car covers 60 km of its 100 km journey in 1.5 hrs. If the average speed of the journey is 50 km/hr, find the speed of the car in the remaining journey.
2. The average of 29 consecutive even integers is 60. The highest of these integers is
3. The average weight of 6 persons is increased by 2.5 kg when one of them whose weight is 50kg is replaced by a new man. What is the weight of the new man?
4. The average pocket money of 3 friends A, B, C is Rs.80 in a particular month. If B spends double and C spends triple of what A spends during that month and if the average of their unspent pocket money is Rs.60. then A spends (in Rs. )
5. The average age of a class of 39 students is 15 years. If the age of the teacher is included, then the average increases by 3 months. Find the age of the teacher.
6. The average of 19 consecutive even integers is 50. The highest of these integers is
7. Average weight of Sunil and Ravi is 45 kg. Average weight of Ravi and Pranit is 41 kg. And average weight of Sunil and Pranit is 42 kg. Then find the weight of Sunil.
8. A car travels a certain distance at 70 km/h and comes back at 30 km/h. Find the average speed for total journey.
9. If average of 20 observations $x_{1}$,$x_{2}$.......$x_{20}$ is y ,then the average of $x_{1}- 101$, $x_{2}- 101$,$x_{3}- 101$, .....,$x_{20}- 101$ is
10. The average age of 30 faculties in a college is 35 years. If the age of their principal is also included, the average increases by one year. The principal's age in years is
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