2) A department store has determined that 25% of all its sales are credit sales .Arandom sales is selected What is the prob that the sample proportion will be greater than 0.34What is the prob that sample is between 0.196 and 0.354Please right working and answer

estion 5 the price of a bond Is uniforung distributed blow 70 and 85 what is the prob that the bond price will be at least 83 between 79 and 90 30 Determine the expected price and Stendard deviation