Q. 21 If I travel by bus, I reach my office 15 min late, and if I travel by car, I reach 10 min early. If the distance between my home and my office is 25 km, then the difference of the reciprocals of average speeds of the bus, in second per meter is:

Q. 24 A boy bought 50 chocolates for Rs 1000. If the average price of 30 chocolates is Rs 25, then what is the average price (in Rs) of the remaining chocolates?

Q. 26 Among four students sitting in a row, the average age of the last three students is 20 years and the average age of the first three students is 21 years. If the age of the first student is 26 years, then what is the age (in years) of the last student?

Q. 31 In a committee there are 25 members. If two members whose ages are 64 years and 40 years are replaced by the two new members, then the average age of 25 members is decreased by 2 years. What is the average age (in years) of the new members?

Q. 33 A boy bought 50 chocolates for Rs 1000. If the average price of 30 chocolates is Rs 25, then what is the average price (in Rs) of the remaining chocolates?

Q. 34 The average revenues of 9 consecutive years of a company is Rs 80 lakhs. If the average of the first 5 years is Rs 75 lakhs and that of the last 5 years is Rs 87 lakhs, find the revenue for the 5th year.

Q. 35 In a class of 60 students, there are 30 girls. The average weight of these girls is 58 Kg and the average weight of the full class is 63 kgs. What is the average weight of the boys of the class?

Q. 36 The average revenues of 9 consecutive years of a company is Rs 80 lakhs. If the average of the first 5 years is Rs 75 lakhs and that of the last 5 years is Rs 87 lakhs, find the revenue for the 5th year.

Q. 37 A factory buys 7 machines. 2 Machine A, 2 Machine B and rest Machine C. Prices of the machines are Rs 95000, Rs 75000 and Rs 43000 respectively. Calculate the average cost of these machines?

Q. 38 Among the three numbers, the first is twice the second and thrice the third, If the average of three numbers is 517, then what is the difference between the first and the third number?

Q. 40 The average revenues of 11 consecutive years of a company is Rs 77 lakhs. If the average of the first 6 years is Rs 72 lakhs and that of the last 6 years is Rs 84 lakhs, What is the revenue for the Sixth year?