Solution :
Given that ,
mean = = 8
standard deviation = = 0.5
P(8< x < 10) = P[(8-8) /0.5 < (x - ) / < (10-8) / 0.5)]
= P( 0< Z < 4)
= P(Z < 4) - P(Z <0 )
Using z table,
= 1-0.5000
=0.50
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