Mathematics
The mean of 20 numbers is 18. If 3 is added to each of the first ten numbers, find the mean of new set of 20 numbers.
Related Questions
For the following distribution :
Class Frequency 0 - 5 10 5 - 10 15 10 - 15 12 15 - 20 20 20 - 25 9 The sum of lower limits of the median class and modal class is
15
25
30
35
An ogive curve is used to determine
range
mean
mode
median
The average height of 30 students is 150 cm. It was detected later that one value of 165 cm was wrongly copied as 135 cm for the computation of mean. Find the correct mean.
There are 50 students in a class of which 40 are boys and the rest girls. The average weight of the students in the class is 44 kg and the average weight of the girls is 40 kg. Find the average weight of boys.