Tetraoxosulphate(VI) acid is not used for making carbon dioxide from calcium carbonate? This is because it

Probability measures likelihood of an event: P(event) = favorable outcomes / total possible outcomes. Values range from 0 (impossible) to 1 (certain). P(not A) = 1 – P(A).

Example: rolling a 6 on a die. Favorable = 1 (just the 6), Total = 6. P = 1/6 ≈ 0.167 or 16.7%. Rolling an even number: 3 favorable (2,4,6) out of 6 = 1/2.

Independent events: P(A and B) = P(A) × P(B). Mutually exclusive events: P(A or B) = P(A) + P(B). Probability helps make decisions under uncertainty.