Jumat, 15 Oktober 2010

Probability

1st Examination
Grade : XI ( SMA 1 Blitar )
Material : Probability

1. There are 4 different English books, 5 different Mathematics books and
3 different Science books on a bookshelf. Find the number of ways in which
a pair of books of different types can be chosen.
2. If 3 British, 3 Indians, 4 Chinese are to be seated in a straight row with 12
seats. how many seating arrangements are possible? If people of the same race
must sit together.
3. In each turn of a game, a player throws a fair die repeatedly until the number
5 is obtained or after he throws it 6 times.
a. Find the probability that the player has exactly 6 throws.
b. Find the probability that the player has more than 3 throws
c. Find the conditional probability that the player has exactly 4 throws in
a turn, given that he has more than 3 throws.

Date of submission : 23 Oct, 2010

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