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ozzi
3 years ago
11

Only for (a) please!

Mathematics
1 answer:
Bas_tet [7]3 years ago
3 0

Answer:

Efx=2300 may be it would help : )

Step-by-step explanation:

To find that u have to :

mass mid value(x) Number..(f) fx

10-29 19 32 608

30-39 9 38 342

40-49 9 64 576

50-59 9 35 315

60-69 9 22 198

70-99 29 9 . 261

Efx=2300

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