Suppose the x-axis of a density graph represents someone's weight in pounds. If the area under the density graph from 120 pounds to 140 pounds
is 0.28, what is the probability of someone's weight being anywhere from 120
pounds to 140 pounds?
A. 52%
B. 34%
C. 46%
D. 28%

The answer is D. 28%

A P E X

Suppose the x-axis of a density graph represents someone's weight in

pounds. If the area under the density graph from 120 pounds to 140 pounds

is 0.28, what is the probability of someone's weight being anywhere from 120

pounds to 140 pounds?

A. 52%

B. 34%

C. 46%

D. 28%

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step-by-step explanation:

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answer: expected value of x = 1.0

step-by-step explanation:

p(x=0) = 0.25

p(x=1) = 0.50

p(x=2) = 0.25

expected value for x = 0×0.25 + 1×0.5 + 2×0.25 = 1.0