A number of students prepared for an examination. Arts, Religion and sculpture. Out of this number, 15 took arts, 20 took religion and 23 took sculpture, 9 took both religion and sculpture, 6 took both arts and sculpture and all those who took arts also took religion. One student fell ill and failed to write any of the papers. How many students took exactly one of the examination papers?​

Acompany produces packets of soap powder labeled “giant size 32 ounces.” the actual weight of soap powder in such a box has a normal distribution with a mean of 33 oz and a standard deviation of 0.7 oz. to avoid having dissatisfied customers, the company says a box of soap is considered underweight if it weighs less than 32 oz. to avoid losing money, it labels the top 5% (the heaviest 5%) overweight. how heavy does a box have to be for it to be labeled overweight?