Which of the following is a discrete random variable?
I. The number of cars crossing a particular signal in a day.
II. The number of customers in a queue to buy train tickets at a moment.
III. The time taken to complete a telephone call.

Which of the following would you regard as discrete variable 1) height 2) weight 3 time 4 ) number of persons in family

Which of the following numbers are prime numbers: (i) 179 (ii) 117 (iii) 139

Which of the following pairs are always co-primes? (i) two prime numbers (ii) one prime and one composite number (iii) two composite numbers

Which of the following things can be found in a ticket? A. Name of boarding and destination point. B. Train number and flight number. C. Time of departure from boarding point for train or a flight. D. Name of a person on a reserved railway ticket. E. Age and sex of traveller is also written on printed format of reserved rail ticket.

Which one of the following is false : (i) Every rational number is a real number (ii) Every integer is a real number (iii) sqrt2 is a rational number

Which of the following statements are true and which are false? (i) Every whole number is a rational number. (ii) Every integer is a rational number. (iii) 0 is a whole number but it is not a rational number.

Which of the following are in inverse proportion? (i) The number of workers on a job and the time to complete the job. (ii) The time taken for a journey and the distance travelled in a uniform speed. (iii) Area of cultivated land and the crop harvested. (iv) The time taken for a fixed journey and the speed of the vehicle. (v) The population of a country and the area of land per person.

Which of the following are in inverse proportion? (i) The number of workers on a job and the time to complete the job. (ii) The time taken for a journey and the distance travelled in a uniform speed. (iii) Area of cultivated land and the crop harvested. (iv) The time taken for a fixed journey and the speed of the vehicle. (v) The population of a country and the area of land per person.