assume the random variable x is distributed mean =50 and standard deviation a=7 find the probability p(x>38)

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=p(x>38)

=1-p(z<=(38-50)/7)

=1-p(z<=-1.7143), from the tables, p(z<=-1.7143)=0.043264

=1-0.043264

=0.957

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