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A man takes a step forward with probability 0.4 and backward with probability 0.6. Find the probability that at the end of 5 steps, he is one step away from the starting point. OR Suppose a girl throws a die. If she gets a 1 or 2, she tosses a coin three times and notes the number of "tails". If she gets 3, 4, 5 or 6, she tosses a coin once and notes whether a 'head' or 'tail' is obtained. If she obtained exactly one "tail", what is the probability that she threw 3, 4, 5 or 6 with the die? |
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Answer» A man takes a step forward with probability 0.4 and backward with probability 0.6. Find the probability that at the end of 5 steps, he is one step away from the starting point. OR Suppose a girl throws a die. If she gets a 1 or 2, she tosses a coin three times and notes the number of "tails". If she gets 3, 4, 5 or 6, she tosses a coin once and notes whether a 'head' or 'tail' is obtained. If she obtained exactly one "tail", what is the probability that she threw 3, 4, 5 or 6 with the die? |
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