absharahmed789 absharahmed789

09-04-2020
Mathematics

contestada

the average marks of the first 10 students are 17 and that of the next 15 students is 18. find the mean of 25 students?

Respuesta :

marinavarfolo marinavarfolo

11-04-2020

Answer:

20

_____

10 = 17

15 = 18

20 = 19

25 = 20

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