Question 1176405
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Hi
Normal Distribution:   μ = 506   σ = 116  
Using TI or similarly an inexpensive calculator like a Casio fx-115 ES plus.

P ( 200 < X < 425) = normalcdf (200,425, 116, 506) = .2383

Important to feel comfortable with Your calculator
and know what is permissible4 in in-class testing.
Wish You the Best in your Studies.
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