Mathematics
If the mean of the data x1, x2, x3, ....., xn is 'a', then the mean of the data x1 + a, x2 + a, ...., xn + a is : 1. a 2. 2a 3. a 4.
Related Questions
Mean of 10 observations is 20 and that of other 15 observations is 16. Mean of all 25 observations will be :
16.6
18.6
19.6
17.6
The height of 8 students in a class are 102 cm, 107 cm, 82 cm, 103 cm, 97 cm, 111 cm, 88 cm, and 94 cm. The mean height is :
94 cm
95 cm
97 cm
98 cm
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