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121 The average run scored by a batsman in 20 innings is 32. After 21st innings, the runs average becomes 34. How much runs does the batsman score in his 21st innings?
122 In the first 10 overs of a cricket game, the run rate was only 1.8. What should be the run rate in the remaining 20 overs to reach the target of 215 runs?
123 A cricketer scored some runs in his continuous 9 innings. He scored 100 runs in his 10th innings and increases his average by 8 runs. What was the average of his runs at the end of 10th innings?
124 Three year ago, the average age of a family of five members was 27 yr. The present average age is also 27 yr after the inclusion of a child into the family. Find the age of the child:
125 The average salary of the entire staff in an office is ? 200 per day. The average salary of officers is ? 550 and that of non-officers is ? 120. If the number of officers is 16, then find the numbers of non-officers in the office:
126 The average height of the basketball team A is 5 ft 11 inches and that of B is 6 ft 2 inches. There are 20 players in team A and 18 players in team B. The overall average height is
127 The average age of three boys is 15 yr. If the ratio of their ages is 3 : 5 : 7, what is the age of the oldest boy?
128 The average weight of 60 students in a class was calculated to be 40 kg. Later, it was found out that the weight of one of the students was calculated as 36 kg, whereas his actual weight was 33 kg. What is the actual average weight of the students in the class?
129 The average of six observations is 12. The average decreases by 1 when a new observation is included. What is the seventh observation?
130 The average temperature of Delhi for four days in a particular month is 48°C. If the average temperature of second and third days is 34° C and the ratio of the temperatures of first and fourth days is 9 : 11, then find out the temperatures of first and fourth days:
