Mathematics

Problem

Three events

R

S

and

T

are mutually exclusive and form an exhaustive set for a random experiment. A student records

P(R)=0.25

P(S)=0.55

and

P(T)=0.30

. Which probability axiom or rule is violated by these recorded values? a)

\text{Non-negativity}

\text{Countable additivity}

\text{Normalization (total probability equals 1)}

\text{None, the values are valid}