Pedro observed what customers ordered at his ice cream shop and found the following probabilities: P(vanilla)=0.3 P(sundae)=0.2 P(vanilla and sundae)=0.15 Find the probability that a customer ordered vanilla ice cream given they ordered a sundae. P(vanilla ∣ sundae)=

At the beginning of 1974/75,2 years a man invested #2000 in a bank at 12.5% compound interest, if it degree #650 at the end of each two years to pay his son's school fees, after payment of interest to pay his son's school fees, how much did he have left at the beginning of the 1978/79 school year?