9 NCERT MATH MCQ

Q 1. Sum of the probability of happening and not happening of an event is: 1 2 0 None of these Q 2. The maximum probability of an event of a trial is: 0 -1 1 Lies between 0 and 1. Q 3. If the probability of winning a game is 0.9 then, the probability of losing the game is 0.1 0.9 0.2 1 Q 4. In an experiment, 100 drawing pins were dropped on a floor. 73 landed point up and the rest landed point down. A pin is selected at random and dropped. What is the probability that the pin will land point down? 0.73 0.27 0.37 0.72 Q 5. The percentages of marks obtained by a student in six unit tests are given below:   Unit test I II III IV V VI Percentage of marks 53 72 28 46 67 61 If a test is selected at random then, the probability that the student gets more than 60% marks in the test is 0.5 0.3 0.2 0.6 Q 6. An event for an experiment is defined as Collection of happenings and non-happenings Collection of probabilities Collection of o...

Q 1. In a raw data the observations 2, 3, 4 and 5 occur with a frequency of 8, 5, 10, 7. So the mode of the data is ________________ 2 3 4 10 Q 2. Three coins were tossed thirty times. Each time the number of heads occurring was noted as follows: 0, 1, 2, 2, 1, 2, 3, 1, 3, 0 1, 3, 1, 1, 2, 2, 0, 1, 2, 1 3, 0, 0, 1, 1, 2, 3, 2, 2, 0 The frequency distribution table for the given data will be  No. of heads Frequency 0 6 1 10 2 9 3 5  No. of heads Frequency 0 5 1 8 2 10 3 6  No.  of heads Frequency 0 7 1 9 2 8 3 4  No.  of heads Frequency 0 6 1 9 2 10 3 4 Q 3. The average marks scored by 100 students were calculated as 40. Later, it was discovered that a score of 38 was misread as 83. Find the correct mean. 42 39.55 50 25.93 Q 4. The mean of 15 observations is 14. If the means of first 7 observations is 12 and that of last 7 observation is 16. Find the middle term. 10 12 14 15 Q 5. Class marks of a frequency distribut...