3 years ago

50 POINTS URGENT

Mathematics

1 answer:

Nostrana [21]3 years ago

3 0

Step-by-step explanation:

mean=5.5

standard dev=2.85

Within 1 standard dev = 5.5-2.85 to 5.5+2.85 = 2.65 to 8.35

Within 2 standard dev = 5.5-2(2.85) to 5.5+2(2.85) = -0.2 to 11.2

Within 3 standard dev = 5.5-3(2.85) to 5.5+3(2.85) = -3.05 to 14.05

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Answer:

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Dividing $3$ both sides.

$\frac{3x}{3}=\frac{600}{3}\\\\x=200$

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