Question

The mean of mark of 20 students are 52 and the mean of mark of 25 students are 43.what is the mean of all 45 students?

Answer 1

Answer:

Step-by-step explanation

when you want to solve the mean you have to add all the variables we have in this case 20+52+25+43=140

then divided the answer by the amount of variables

in this case 140/4=35

lastly add 35+45=80 students if we add all the 45 students

Answer 2

Answer:

Step-by-step explanation:

20X52=1040

then 25X43=1075

then 1040+1075=2115

2115/45=47