probability questions Practice Question and Answer
8 Q: In a lottery, there are 7 prizes and 21 blanks. If a lottery is drawn at random, then what is the probability of getting a prize?
259 0631f3174671e1904db721676
631f3174671e1904db721676- 1$${2\over5}$$false
- 2$${3\over5}$$false
- 3$${1\over4}$$true
- 4$${1\over10}$$false
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Answer : 3. "$${1\over4}$$"
Q: A bag contains 30 balls, numbered 1 to 30. Two balls are drawn at random. What is the probability that the balls drawn contain a number which is multiple of 4 or 6 but not a multiple of both?
336 062c3f815a00ee61c312c23ee
62c3f815a00ee61c312c23ee- 1$$ {1\over6}$$false
- 2$$ {1\over5}$$false
- 3$$ {1\over4}$$false
- 4$$ {1\over3}$$false
- 5None of thesetrue
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Answer : 5. "None of these"
Q: 9 persons are seated around a round table. What is the probability that two particular persons sit together?
398 0620112d5fd5f0218b81d0413
620112d5fd5f0218b81d0413- 1$$ {1\over 4}$$true
- 2$$ {2\over 5}$$false
- 3$$ {1\over 3}$$false
- 4$$ {3\over 4}$$false
- 5$$ {2\over 3}$$false
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Answer : 1. "$$ {1\over 4}$$"
Q: There are 3 green, 4 orange and 5 white color bulbs in a bag. If a bulb is picked at random, what is the probability of having either a green or a white bulb?
1133 061b1ed5a8b0b930f53fe4d0b
61b1ed5a8b0b930f53fe4d0b- 13/4false
- 22/3true
- 34/3false
- 42/5false
- 5None of thesefalse
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Answer : 2. "2/3"
Q: What is the probability of forming word from the letters of word “IMPEACH” such that all vowels come together?
533 0619f5a2bc1c85f0fbf503a19
619f5a2bc1c85f0fbf503a19- 1$$ {8\over 35}$$false
- 2$$ {1\over 7}$$true
- 3$$ {3\over 35}$$false
- 4$$ {17\over 35}$$false
- 5$$ {2\over 7}$$false
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Answer : 2. "$$ {1\over 7}$$"
Q: Ten different letters of alphabet are given, words with 5 letters are formed from these given letters. Then, how many such words can be formed which have at least one letter repeated ?
603 0608be07b5c992217d582290e
608be07b5c992217d582290e- 169760true
- 269970false
- 367960false
- 465760false
- 569790false
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Answer : 1. "69760 "
Q: There are some coins and rings of either gold or silver in a box. 60% of the objects are coins, 40% of the rings are of gold and 30% of the coins are silver. What is the percentage of gold articles?
1069 05ed4a0765ccf7008ed88e29f
5ed4a0765ccf7008ed88e29f- 158true
- 227false
- 316false
- 470false
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Answer : 1. "58"
Q: In how many different ways can the letters of the word 'NATIONAL' be arranged?
754 05eb012adcaa4f678cf75b341
5eb012adcaa4f678cf75b341- 16720false
- 25040false
- 310080true
- 41020false
- 53360false
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