Question 1147387
accept if z < (5.426-5.366)/0.056 or z < 0.06/0.056 or z<1.07
or if z> (5.306-5.366)/0.056 or z>0.06/0.056 or z>-1.07
That is probability of acceptance is 0.7154
the probability of rejection is 0.2846
For 300 coins, 300*0.2846=85.38 or 85 coins