Report Error 1980-2018 General knowledge questions and answers for all competitive exams like UPSC, Bank PO, CDS, CMAT, SSC CGL etc. 1. Statistics and Probability Problems with Solutions - sample 2 ... 149+ Solved Probability Questions and Answers ... - sawaal.com Frequently asked simple and hard probability problems or questions with solutions on cards, dice, bags and balls with replacement covered for all competitive exams,bank,interviews and entrance tests. If two balls are picked up from the bag without replacement, then the probability of the first ball being red and second being green is 3/26. Sawaal.com provides free mock tests for all govt. A problem is given to three students whose chances of solving it are 1/2, 1/3 and 1/4 respectively. The probability that all of them are red, is: Then, n(S) = number of ways of drawing 3 balls out of 15 = 15C3 =15*14*133*2*1= 455. Study the diagram and answer the following questions. Practice free online test series, analyse and improve your performance A bag contains 6 white and 4 black balls .2 balls are drawn at random. The line graph shows the number of vacancies for sales officers in a certain company. Frequently asked simple and hard probability problems or questions with solutions on cards, dice, bags and balls with replacement covered for all competitive exams,bank,interviews and entrance tests. Let A = event of getting both black cards, A∩B = event of getting queen of black cards, n(A) = 52*512*1 = 26C2 = 325, n(B)= 26*252*1= 4*3/2*1= 6 and n(A∩B) = 4C2 = 1, P(A∪B) = P(A) + P(B) - P(A∩B) = (325+6-1) / 1326 = 330/1326 = 55/221. In ΔDEF measure of angle E is 90°. A man and his wife appear in an interview for two vacancies in the same post. In a bag which contains 40 balls, there are 18 red balls and some green and blue balls. Then E= { (1, 1), (1, 2), (1, 4), (1, 6), (2, 1), (2, 3), (2, 5), (3, 2), (3, 4), (4, 1), (4,3),(5, 2), (5, 6), (6, 1), (6, 5) }. The length of one side and the diagonal of a rectangle are 7 cm and 25 cm respectively. If two coins are tossed, the S = {HH, HT, TH, TT}. Report Error FACTS AND FORMULAE FOR PROBABILITY QUESTIONS. What is the value of the coefficient variation? Cards of spades and clubs are black cards. 4. Find the area (in cm²) of a semi-circle of radius 21 cm. Experiment : An operation which can produce some well-defined outcomes is called an experiment. If cosD = 8/17, and DE = 16cm, then what is the length (in cm) of side DF? What is the probability that the ticket drawn has a number which is a multiple of 3 or 5? Find the probability that they are of same colour. Sample Space: When we perform an experiment, then the set S of all possible outcomes is called the sample space. 0≤P(E)≤1 iii. What is the value of the coefficient variation? ii. Let E = event of getting all the 3 red balls. i. i. P(S) = 1 ii. What is the probability that the problem will be solved? Find the number of blue balls in the bag. These are all called face cards. Report Error Let A, B, C be the respective events of solving the problem and A , B, C be the respective events of not solving the problem. In a lottery, there are 10 prizes and 25 blanks. Probability is the branch of mathematics concerning numerical descriptions of how likely an event is to occur, or how likely it is that a proposition is true. Find the number of blue balls in the bag. The mean of distribution is 11 and the standard deviation is 5. View Answer In this section you can learn and practice gk questions on history, geography, politics, economy, culture, sports, inventions, physics, chemistry, biology, famous personalities and … 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? It has 13 cards of each suit, name Spades, Clubs, Hearts and Diamonds. If two balls are picked up from the bag without replacement, then the probability of the first ball being red and second being green is 3/26. Find its diameter (in cm). When we throw a coin, then either a Head (H) or a Tail (T) appears. Learn and practice basic word and conditional probability … exams like Bank, SSC, Railway, etc. Random Experiment :An experiment in which all possible outcomes are know and the exact output cannot be predicted in advance, is called a random experiment. Probability Questions & Answers for Bank Exams : If the standard deviation of a population is 4.5, what would be the population variance? Two cards are drawn at random from a pack of 52 cards.what is the probability that either both are black or both are queen? What was the difference in the number of vacancies between the years 2015 and 2012? Quantitative Aptitude - Arithmetic Ability. Learn and practice basic word and conditional probability aptitude questions with shortcuts, useful tips to … A five digit number is formed with the digits 0,1,2,3 and 4 without repetition. Three balls are drawn at random from the bag. Event : Any subset of a sample space is called an event. Probability of Occurrence of an Event : Let S be the sample and let E be an event. A bag contains 4 white, 5 red and 6 blue balls. Sawaal.com provides free mock tests for all govt. A lottery is drawn at random. There are 4 honours of each unit. If the difference between the mode and median is 2, then the difference between the median and mean is: In a bag which contains 40 balls, there are 18 red balls and some green and blue balls. 5. The salary of a Sales officer in the company is Rs 20,000, then what was the increase in the expense (in Rs lakhs) due to salaries that had to be paid when posts were filled for the vacancies in the year 2015? The probability that the total score is a prime number is: Let E = Event that the sum is a prime number. Discuss. The number of vacancies in 2014 were greater than that in 2017 by ________. P(∅)=0, v. If A denotes (not-A), then P(A)=1-P(A). Two dice are tossed. Quantitative Aptitude - Arithmetic Ability, Quantitative Aptitude - Data Interpretation. Practice free online test series, analyse and improve your performance If the standard deviation of a population is 4.5, what would be the population variance? Sawaal.com is leading website for questions and answers covering Quantitative Aptitude, General knowledge, Verbal reasoning, Non Verbal reasoning, Puzzles, Certifications, Competitive Exams , Technology and Interviews. iii. We first calculate the probability of getting an even number on one and a multiple of 3 on other,Here, n(s) = 6x6 = 36 and, E = (2,3) (2,6) (4,3) (4,6) (6,3) (6,6) (3,2) (3,4)(3,6) (6,2)(6,4), n(E) = 11P(E) = 11/36Required probability = 1-11/36 = 25/36, Copyright © 2019 Sawaal.com | All Rights Reserved, Divisible by 5 then the last digit should be 0. 3. What is the probability of getting a prize? View Answer
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