Q 1. If an unbiased coin is tossed then the event of getting a 'head' or 'tail' is called impossible event elementary event complementary event certain event Q 2. Which one of the following cannot be the probability of an event? 1.1 0.1 0.9 5% Q 3. If the probability of winning a game is 0.3, then the probability of losing it is: 0.5 0.2 0.7 0.3 Q 4. If the probability of winning a game is 0.995, then the probability of losing is 1 0.05 0.005 0 Q 5. Find the probability of getting one if a dice thrown 1000 times? 0.5 0.18 0.13 1 Q 6. The probability of an event that is certain to happen is -1 2 1 0 Q 7. An urn contains lottery tickets numbered from 1 to 100. If a ticket is selected at random, then the probability that it is a perfect square is 0.01 0.08 0.09 0.1 Q 8. A bag contains 12 balls out o...
Q 1. The mean of a data set with 10 observations is calculated as 17.85. If one more value is included in the data, then for the new data with 11 observations, mean becomes 18.50. Value of this 11 th observation is 24 26 25 28 Q 2. If the mean of the following distribution is 2.6, then the value of y is Variable (x) 1 2 3 4 5 Frequency 4 5 y 1 2 3 8 13 24 Q 3. The value of the observation having greatest frequency is called____. Mean Median Mode All of above Q 4. Find out the mode of the following data: Wages Less than 200 300 400 500 600 700 800 900 No. of workers 5 18 38 70 90 95 98 100 450 400 478 600 Q 5. The point of intersection of a less than ogive and more than ogive is (12, 15). The value of median is 12 15 12.5 15.5 Q 6. Age (in yrs.) 12 13 14 15 16 No. of students 2 7 3 4 2 Modal age of students in given distribution is 12 years 13 years 14 years 15 years Q 7. For a frequency distribution, mean, median ...