Mean*total=49.46*100+52.32*200=15410 and total is 300
mean=51.37
The mean marks obtained in an examination by a group of 100 students were found to be 49.46 the mean marks obtained in same examination by a group of 200 students were 52.32 find out mean of marks obtained by both the groups together
2 answers
utility any object or circumstance can be considered.
2 answers