- #1

viviane363

- 17

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A box contains three coins with a head on each side, four coins with a tail on each side, and two fair coins. If one of these nine coins is selected at random and tossed once, what is the probability that a head will be obtained?

Here is what I think:

1) A: the event that one of the three coins with a head on each side is chosen.

B: the event that one of the four coins with a tail on each side is chosen.

C: the event that one of two fair coins is chosen.

P(A)=1/8, P(B)=1/16, P(C)=1/4

P(a head will be obtained)= ? I don't know where to start from there now.