Mathematics
The mean of 25 observations was calculated to be 44. Later on it was found that two of the observations 34 and 46 were wrongly copied as 28 and 42. The correct mean will be :
39.4
40.4
44.4
43.9
Related Questions
If the mean of the data y1, y2, y3, …., yn is 102, then the mean of the data 5y1, 5y2, 5y3, …., 5yn is :
102
204
510
606
The average score of Raman in last 5 innings is 42. If he scored 38, 41, 43 and 47 in first 4 innings, then his score in the fifth innings was :
31
41
51
61
The median of the following observations : 11, 12, 14, 18, (x + 4), 30, 32, 35, 41 arranged in ascending order is 24. The value of x is :
19
20
21
21.5
If the mean of x - 3, x - 1, 7, x, 2x - 1 and 3x - 5 is 3.5, then the median is :
2.5
3.5
3.8
3.9