# Ex.15.1 Q4 Probability Solution - NCERT Maths Class 10

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## Question

Which of the following cannot be the probability of an event?

(i) \(\begin{align} \frac23 \end{align}\) (ii) \(\begin{align} -1.5 \end{align}\) (iii) \(\begin{align}15 \% \end{align}\) (iv) \(\begin{align}0.7 \end{align}\)

## Text Solution

**Steps:**

We know that the probability of an event lies between \(0\) and \(1\) i.e. \(0 \le{ P(E)} \le 1\) and it cannot be less than \(0\) and greater than \(1.\)

So, (ii) i.e. \(-1.5\) cannot be the probability of an event because it cannot be negative.