The answers are: (i) 0, (ii) sample space, (iii) 1 and (iv) 1/2 (or 0.5). These represent fundamental probability values: 0 denotes impossibility, 1 indicates certainty and an unbiased coin yields an even chance of 0.5.
Fill in the blanks. (i) The probability of an impossible event is _______. (ii) The set of all possible outcomes of a random experiment is called the _______. (iii) The probability of an event that is certain to happen is _______. (iv) Tossing a fair coin has a probability of _______ for getting heads.
Share
(i) 0 (An event that cannot happen at all has a probability of 0).
(ii) sample space (The collection containing every possible result of a trial is defined as the sample space).
(iii) 1 (An event guaranteed to take place has maximum likelihood, which equals 1).
(iv) 1/2 or 0.5 (A fair coin possesses two symmetric, equally likely outcomes, heads and tails, giving P(heads) = 1/2).
For more NCERT Solutions of Class 9 Ganita Manjari Chapter 7 The Mathematics of Maybe: Introduction to Probability Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/maths/ganita-manjari-chapter-7/