Question 1175347
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Hi
 p-hat = 20/50 = .40
{{{z =blue (x - mu)/sqrt(blue(p(1-p)/n))}}}
   z = {{{(.40-.45)/sqrt(blue(.45*.55)/50))}}} = -.7107
 P(z ≤ -.7107)= .2386
Wish You the Best in your Studies.
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