35 households were selected as part of a study on electricity usage and the number of kilowatt-hours was recorded for each household. The average usage was found to be 450 kWh. In a very large study in the first quarter of the previous year, it was found that the standard deviation of the usage was 81 kWh. Based on this information how many of the households is expected to have a usage of less than 300 kWh? Round off to the nearest integer