Mathematics
The mean weight of 17 boxes is 92 kg. If 18 new boxes are added, the mean weight increases by 3 kg. What will be the mean weight of the 18 new boxes?
91.8 kg
92.8 kg
97.8 kg
98.8 kg
Related Questions
A distribution consists of three components with frequencies 45, 40 and 15 having their means 2, 2.5 and 2 respectively. The mean of the combined distribution is :
2.1
2.2
2.3
2.4
The combined mean of three groups is 12 and the combined mean of first two groups is 3. If the first, second and third groups have 2, 3 and 5 items respectively, then the mean of third group is :
10
12
13
21
Consider the following distribution :
Class Frequency 0 – 20 17 20 – 40 28 40 – 60 32 60 – 80 f 80 – 100 19 If the mean of the above distribution is 50, what is the value of f ?
24
34
56
96
Which of the following cannot be determined graphically?
Mean
Median
Mode
none of these