Hello, puzzledwithpolynomials!

With only three coins, we canThree coins are tossed.

Find the probabilikty that they all land Heads up for each known condition.the eight possible outcomes.list

. .

and we don't need any fancy formulas.

6. The first coin shows a Head.

The first is a Head; there are 4 cases: .

Among them,case has all Heads.one

Therefore: .

7. At least one coin shows a Head.

"At least one Head", there are 7 cases: .

Among them,case has all Heads.one

Therefore: .

8. At least two coins show Heads

"At least 2 Heads", there are 4 cases: .

Among them,case has all Heads.one

Therefore: .