Multiple choice

Two persons a and b toss a coin, alternately, till one of them gets a heads and wins the game. What is their respective probabilities of winning?

  1. 2/3, 1/3

  2. 1/5, 2/7

  3. 1/3, 2/7

  4. 1/5, 1/3

  5. -
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

If a wins, then the probability = 1/2 + 1/2 x 1/2 x 1/2 + 1/2 x 1/2 x 1/2 x 1/2 x 1/2 +……………..= 1/3 Option 1 is correct.

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