# Ex.15.1 Q1 Probability Solution - NCERT Maths Class 10

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## Question

Complete the following statements:

(i) Probability of an event $$\rm{E +}$$ Probability of the event 'not $$\rm{E}$$'__________.

(ii) The probability of an event that cannot happen is __________ Such an event is called __________.

(iii) The probability of an event that is certain to happen is __________Such an event is called __________.

(iv) The sum of the probabilities of all the elementary events of an experiment is  __________.

(v) The probability of an event is greater than or equal to $$0$$ and less than or equal to __________.

Video Solution
Probability
Ex 15.1 | Question 1

## Text Solution

Steps:

(i) Probability of an event $$\rm{E +}$$ Probability of the event 'not $$\rm{E}$$'\begin{align}\underline{=1}\end{align}

(ii) The probability of an event that cannot happen is $$\underline{0.}$$ Such an event is called impossible event.

(iii) The probability of an event that is certain to happen is $$\underline{1.}$$ Such an event is called sure event.

(iv) The sum of the probabilities of all the elementary events of an experiment is  $$\underline{1.}$$

(v) The probability of an event is greater than or equal to $$\underline{0}$$ and less than or equal to $$\underline{1.}$$

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