It was Gabriella's birthday today, and she was distributing toffees to her classmates. The toffees were in a bag as shown below, and she puts his hand in and pulls out a toffee without looking. What is the probability that she picked out a striped toffee ?
A shopkeeper sells two quality of rice at rate of $ 18 per kg. and $ 5.5 per kg, gaining 20% and 10% profit respectively. If he mixes the two variants in the ratio 2:3 and sells the mixture at $ 8.1 per kg., what is his gain or loss?