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A fair coin is tossed until one of the two sides occurs twice in a row. The probability that the number of tosses required is even is
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Question 1
In a group of 50 scouts in a camp, 30 are well trained in first aid techniques while the remaining are well trained in hospitality but not in first aid. Two scouts are selected at random from the group. Find the probability distribution of number of selected scouts who are well trained in first aid. Find the mean of the distribution also. Write one more value which is expected from a well trained scout.Question 2
In a game, a man wins Rs. 5 for getting a number greater than 4 and loses Rs. 1 otherwise, when a fair die is thrown. The man decided to throw a die thrice but to quit as and when he gets a number greater than 4. Find the expected value of the amount he win/loses.
| Question Text | A fair coin is tossed until one of the two sides occurs twice in a row. The probability that the number of tosses required is even is |
