Question

For two coins tossed, what does the condition “At least one tail” mean?

Options

• Exactly 1 head, giving \(\{HT, TH\}\) with \(n = 2\)

• 0 heads, giving \(\{TT\}\) with \(n = 1\)

• 1 or more tails, giving \(\{HT, TH, TT\}\) with \(n = 3\)

• 0 or 1 tail, giving \(\{HH, HT, TH\}\) with \(n = 3\)

Answer 1

“At least one” means 1 or more tails. The possible qualifying outcomes are therefore \(HT\), \(TH\), and \(TT\).