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A lady has 100 addressed envelopes for 100 letters.She puts one letter in each envelope.
What is the probability that 1 letter is in improper envelope?

Read Solution (Total 2)

prob 0
1 letter can'nt be improper
13 years agoHelpfull: Yes(5) No(0)

answer is 0.because if one letter goes in incorrect envelop then other one will also go in incorrect envelope...
13 years agoHelpfull: Yes(1) No(0)

TCS Other Question

One day Snow-white meets Pal and Unicorn in the Fairyland. She knows the Pal lies on Mondays, Tuesdays and Wednesdays, and tells the truth on the other days of the week. Unicorn, on the other hand, lies on Thursdays, Fridays and Saturdays, but tells the truth on the other days of the week. Now they make the following statements to Snow-white – Pal: Yesterday was one of those days when I lie. Unicorn: Yesterday was one of those days when I lie too. What day is it? The citizens of planet Oz are fingered and thus have developed a number system in base 6. A certain street in Oz contains 1000 buildings numbered from 1 to 1000. How many 2’s are used in numbering these buildings? Express your answer in base 10.
(a) 144
(b) 24
(c) 108
(d) 36