Mathematics
The mean of 5 observations is 15. If the mean of first three observations is 14 and that of the last three is 17, find the third observation.
Related Questions
The mean of 5 numbers is 20. If one number is excluded, mean of the remaining numbers becomes 23. Find the excluded number.
The mean of 25 observations is 27. If one observation is included, the mean still remains 27. Find the included observation.
The mean of 8 variates is 10.5. If seven of them are 3, 15, 7, 19, 2, 17 and 8, then find the 8th variate.
The mean weight of 8 students is 45.5 kg. Two more students having weights 41.7 kg and 53.3 kg join the group. What is the new mean weight?