Aptitude ➤ Averages ➤ Set 1

#### Averages : Important Facts and Formulae

Average:
Average = Sum of observations / Number of observations

Average Speed :
Suppose a man covers a certain distance at x kmph and an equal distance at y kmph.
Then, the average speed druing the whole journey is [2xy/(x+y)] kmph.
Question 31
Q31.  The average of 50 numbers is 38. If two numbers, namely 55 and 45 are discarded the average of the remaining numbers is :
Question 32
Q32.  The average of runs of a cricket player of 10 innings was 32. How many runs must he make in the next inning so as to increase his average of runs by 4 ?
Question 33
Q33.  The batting average for 30 innings of a cricket player is 40 runs. His highest score exceeds his lowest score by 100 runs. If these two innings are not included, the average of the remaining 28 innings is 38 runs. The lowest score of the player is :
Question 34
Q34.  The average run of a player is 32 out of 10 innings. How many runs must he make in the next innings so as to increase his average by 6 ?
Question 35
Q35.  The average weight of 40 children of a class is 36.2 kg. When three more children with weight 42.3 kg, 39.7 kg and 39.5 kg join the class, the average weight of the 43 children in the class is :