Question: Mrs. Harrington bought 12 boxes of oranges at the market. She gave her mom and her sister 2 boxes of oranges each. Then she kept 1/4 of the oranges and sold the rest. How many oranges did Mrs. Harrington sell if each box contains 20 oranges?
Give me a solution to this problem
Answer: 
Mrs. Harrington gave a total of 2 x 2 = 4 boxes of oranges to her mom and sister.
She then had 12 - 4 = 8 boxes of oranges left.
She kept 8 x 1/4 = 2 boxes of oranges.
So, she had 8 - 2 = 6 boxes of oranges to be sold.
Hence, Mrs. Harrington sold 6 boxes x 20 oranges = 120 oranges.