Probability

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You are given three coins: one has heads on both faces, the second has tails on both faces, and the third has a head on one face and a tail on the other. You choose a coin at random and toss it, and it comes up heads. The probability that the other face is tails is..........
1/4
no
1/3
yes
1/2
no
2/3
no
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Ram and Ramesh appeared in an interview for two vacancies in the same department. The probability of Ram’s selection is 1/6 and that of Ramesh is 1/8. What is the probability that only one of them will be selected?
47/48
no
1/4
yes
13/48
no
35/48
no
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Two packs of cards are thoroughly mixed and shuffled and two cards are drawn at random, one after the other. What is the probability that both of them are Jacks?
1/13
no
2/13
no
7/1339
yes
1/169
no
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When three coins are tossed together the probability that all coins have the same face up is.......
1/3
no
1/6
no
1/8
yes
1/12
no
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There are 6 different letters and 6 correspondingly addressed envelopes. If the letters are randomly put in the envelopes, what is the probability that exactly 5 letters go into the correctly addressed-envelopes?
Zero
yes
1/6
no
1/2
no
5/6
no
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