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oee [108]
3 years ago
7

Plz help me with this

Mathematics
1 answer:
allochka39001 [22]3 years ago
7 0

Answer:  B) 160

<u>Step-by-step explanation:</u>

Since the Standard deviation of 21 bins is 3 bins, then the first 7 bins falls in the first 2.5% edge of the bell curve.

2.5% of 21 times 1000 = (0.025)(21)(1000) = 160

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