Q21 Average weight of 11 students is 30 kg. If the average weight increases by 0.5 kg when Suresh, one of the students leaves the group, what is the Suresh’s weight?

Q22 The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?

Q23 A Batsman makes a score of 87 runs in the 17th inning and thus increases his average by 3. Find his average after the 17th inning.

Q24 Nine persons went to a hotel for taking their meals. Eight of them spent Rs.12 each on their meals and the ninth spent Rs.8 more than the average expenditure of all the nine. What was the total money spent by them.

Q25 When a student weighing 45 kgs left a class, the average weight of the remaining 59 students increased by 200g. What is the average weight of the remaining 59 students?

Q26 The average wages of a worker during a fortnight comprising 15 consecutive working days was Rs.90 per day. During the first 8 days, his average wages was Rs.87/day and the average wages during the last 8 days was Rs.92 /day. What was his wage on the 8th day?

Q27 40% of the employees in a factory are workers. All the remaining employees are executives. The annual income of each worker is Rs. 390. The annual income of each executive is Rs. 420. What is the average annual income of all the employees in the factory together?

Q28 The total age of the ages of class of 75 girls is 1050 years, the average age of 25 of them is 12 years and that of another 25 is 16 years. Find the average age of the remaining girls?

Q29 The difference between two angles of a triangle is 24°. The average of the same two angles is 54°. What is the value of the greatest angle of the triangle?

Q30 A motorist travels to a place 150 km away at an average speed of 50 km per hour and returns at 30 km per hour. His average speed for the whole journey in km per hour is :