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son4ous [18]
3 years ago
14

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?

Mathematics
1 answer:
Alex787 [66]3 years ago
6 0

Answer:

20

_____

10 = 17

15 = 18

20 = 19

25 = 20

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