Question

a random experiment was conducted. which of these cannot be considered as a probability of an OUTCOME? i) 1/5 ii) -1/7 iii) 0.40 iv) -0.52 v) 0​

Answer 1

$\frac{-1}{7}, -0.52, 0$ cannot be considered as a probability of an outcome.

Step-by-step explanation:

A random experiment was conducted.

Rules of probability :

a) Probability should be non-negative number.

b) The probability of sample space is equal to 1.

c) Probability should be 0 < p < 1

Here, i) $\frac{1}{5} = 0.2 < 1$    (this can be probability of experiment)

ii) $\frac{-1}{7}$. This is a negative number. This cannot be our answer.

iii) 0.40 which is greater than 0 and less than 1. So, this can be our answer.

iv) -0.52 which is a negative number. So, this cannot be our answer.

v) 0. The probability cannot be zero.

Hence, $\frac{-1}{7}, -0.52, 0$ cannot be considered as a probability of an outcome.