Solution :
Given that ,
mean = = 8
standard deviation = = 0.5
P(x >8 ) = 1 - P(x <8 )
= 1 - P[(x - ) / < (8 - 8) /0.5 ]
= 1 - P(z <0 )
Using z table,
= 1 -0.50
=0.50
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