First part is correct.
Part 2.
Here n=80 and p=0.3
So E(P)= np=80*0.3=24 > 10
nq=80*0.7=56 >10 Both the conditions satisfies so we can use Normal Approximation here.
Standard Deviation = =0.051
P[More than 38% of the people ] =P(X>0.38)
=P(Z>0.38-0.3/0.051)
=P(Z>1.57)
=1-P(Z<1.57)
=1-0.9418
=0.0582
Hope this will be helpful. Thanks and God Bless You:) If any
query in the solution, please post in comments
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