16 . A coin is tossed four times .... What is the probability of getting heard on all tosses?
- A. 1/4
- B. 1/8
- C. 1/16
- D. 3/16
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অফিসার (জেনারেল) - 12.11.2021
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17 . A die is rolled and a coin is tossed What is the probability that a 3 will be rolled and a tail tossed?
- A. 1/2
- B. 1/6
- C. 1/8
- D. 1/12
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প্রবেশনারি অফিসার | 02-04-2022
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18 . A die is rolled twice. What is the probability of getting a sum equal to 9?
- A. 2/3
- B. 2/9
- C. 1/6
- D. 1/9
- E. None of these
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19 . A driver of an auto rickshaw sees a lorry m ahead of him .After 30 seconds the lorry 90 m behind. If the speed of the auto rickshaw is 38 km /hr, then what is the speed of the lorry?
- A. 23 km/hr
- B. 25 km /hr
- C. 20 km /hr
- D. 18 km /hr
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জনতা ও রূপালী ব্যাংক- অফিসার ১৩.১২.২০১৯
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Bangladesh Bank - Officer(Cash) - 2011
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21 . A fair coin is to be tossed 100 times with each toss resulting in a head or a tail. If H is the total number of heads and T is the total number of tails, which of the following events has the greats possibility?
- A. H =50
- B. T> 60
- C. H<5 or H> 95
- D. H>48 and T> 48
- E. 51
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First Security Islami Bank Ltd | Probationary Officer | 19-02-2021
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24 . A jar contains 13 red marbles and 7 green marbles. The probability that a marble selected from the jar at random will be green is___
- A. 0.5
- B. 1.0
- C. 0.35
- D. 0.65
- E. All of these
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25 . A jar contains 4 red toothpicks , 10 blue toothpicks and 6 yellow toothpicks. If three toothpicks are removed from the bag at random and no toothpick is returned to the bag after removal, what is the probability that all three toothpicks will be blue?
- A. 1/2
- B. 1/8
- C. 3/20
- D. 2/19
- E. None of these
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26 . A jogger running at 9 km/hr alongside a railway track is 240 meters ahead of the engine of a 120 meters long train running at 45 km/hr in the same direction. In how much time will the train pass the jogger?
- A. 3.6 sec
- B. 18 sec
- C. 36 sec
- D. 72 sec
- E. None of these
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27 . A man can hit a target once in 4 shots. If he fires 4 shots in succession , what is the probability that he will hit his target?
- A. 1/256
- B. 81/256
- C. 175/256
- D. 144/256
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28 . A number is selected at random from 40 to 59 inclusive. What is the probability that the number is prime number?
- A. 3/11
- B. 3/10
- C. 2/11
- D. 1/5
- E. None of these
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29 . A special lottery is to be held to select the student who will live in the only deluxe room in a dormitory. There are 100 seniors, 150 juniors, and 200 sophomores who applied. Each senior's name is placed in the lottery 3 times, each junior's name, 2 times, and each sophomore's, 1 time. What is the probability that a senior's name will be chosen?
- A. 1/8
- B. 2/9
- C. 2/7
- D. 3/8
- E. None of these
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