# 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.