A committee of 3 people is to be formed from a group of 6 people. How many different committees are possible?
Emily thought for a moment and then solved the problem. She calculated the total revenue as 250 loaves x $2 = $500, and the total cost as 250 loaves x $0.50 = $125. Then, she subtracted the cost from the revenue to get the profit: $500 - $125 = $375.
If a bakery sells 250 loaves of bread per day at $2 each, and each loaf costs $0.50 to produce, what is the bakery's daily profit?
Feeling confident, Emily moved on to the next question:
One day, while practicing, Emily came across a question that made her scratch her head:
A deck of 52 cards has 4 suits (hearts, diamonds, clubs, and spades), each with 13 cards. If a card is randomly drawn, what is the probability that it is a heart or a diamond?