There are 40 students in a class, 12 girls and 28 boys. What is the probability of picking a girl out of the class and how likely is it that a girl would be chosen?

Tom had a total of $220 and he spent $35 on a basketball ticket . what percent of his money did he have left?

Eliza wants to make $10,000 from her investments. she finds an investment account that earns 4.5% interest. she decides to deposit $2,500 into an account. how much money will be in her account after 14 years?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)