Answer:
105 ways
Step-by-step explanation:
Because the order of selection does not matter, we know that we will be using a combination instead of a permutation.
₁₅C₂ = 15! / (2! * 13!)
= 15 * 14 * ... * 2 * 1 / 2 * 1 * 13 * 12 * ... * 2 * 1
= 15 * 14 / 2 * 1 (The 13! cancels out)
= 105
Answer:
To multiply mixed numbers, first change any mixed number to an improper fraction. Then multiply the numerators together and the denominators together, as shown in Example .
Step-by-step explanation:
<span>The probability is 80% or .8. Bill could have to wait anywhere from 0-25 minutes, and only 5 of those would mean he waits less than 5 minutes. So 20/25 = .8 = 80%.</span>
