Jambo auditors have engaged three audit trainees Odhiambo Koech, and Mailu. After three weeks, the supervisor notices that 1% 2% and 3% of the accounts audited by Odhiambo, Koech and Mailu respectively have errors.The supervisor had distributed the accounts such that Odhiambo, Koech and Mailu audited 20%, 40% and 40% respectively.