Question 1176345
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Hi
Normal Distribution:    μ = 78   σ = 10
Using TI or similarly like an inexpensive Casio fx-115 ES plus 
p(x ≤ 75) = normalcdf (-9999, 75, 78, 10) = .3821    |-9999 a placeholder only

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and know what is permissible for in-class testing.
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