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Quantitative Aptitude

PROBABILITY MCQs

Probability, Probability I

Total Questions : 775 | Page 76 of 78 pages
Question 751. The standard deviation of the set {10, 11, 12, 9, 8} is
  1.    1
  2.    √2
  3.    2
  4.    2√2
 Discuss Question
Answer: Option B. -> √2
Question 752. Find the median, mode and mean of 9, 5, 8, 9, 9, 7, 8, 9, 8
  1.    9, 9, 9
  2.    9, 8, 9
  3.    8, 9, 8
  4.    8, 9, 9
 Discuss Question
Answer: Option C. -> 8, 9, 8
Question 753. Find the standard deviation of {11, 7, 10,13, 9}
  1.    1
  2.    2
  3.    4
  4.    5
 Discuss Question
Answer: Option B. -> 2
Question 754. One card is drawn from deck of 52 cards, each of the 52 cards being equally likely to be drawn
  1.    1/3
  2.    1/2
  3.    1/4
  4.    1/6
 Discuss Question
Answer: Option B. -> 1/2
Question 755. Find the probability that one ball is white when two balls are drawn at random from a basket that contains 9 red, 7 white and 4 black balls
  1.    18/95
  2.    18/190
  3.    1/2
  4.    91/190
 Discuss Question
Answer: Option D. -> 91/190
Question 756. From well shuffled standard pack of 52 playing cards,one card is drawn
  1.    1/2
  2.    3/4
  3.    1
  4.    1/3
 Discuss Question
Answer: Option C. -> 1
Question 757. What is the median of the following list of numbers   55, 53, 56, 59, 61, 69, and 31 ?
  1.    55
  2.    56
  3.    59
  4.    61
 Discuss Question
Answer: Option B. -> 56
Question 758. Find the probability of selecting 2 woman when four persons are choosen at random from a group of 3 men, 2 woman and 4 children
  1.    1/5
  2.    1/7
  3.    1/6
  4.    1/9
 Discuss Question
Answer: Option C. -> 1/6
Question 759. In a single throw with 2 dices, what is probability of neither getting an even number on one and nor a multiple of 3 on other?
  1.    11/36
  2.    25/36
  3.    5/6
  4.    1/6
 Discuss Question
Answer: Option B. -> 25/36
Question 760. What is the probability that it is either a heart card or diamond card, when a card is drawn from a well shuffled standard pack of 52 playing cards?
  1.    1
  2.    1/2
  3.    3/4
  4.    1/3
 Discuss Question
Answer: Option B. -> 1/2

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