Question 33 of 55beginner🔧 ApplyVery Short1 mark

If 2/11 is the probability of an event, what is the probability of the event ‘not A’.

Correct Answer

9/11

Exercise: EXERCISE 14.2 | Q: 9 | (Page Page 17)
For More Understanding

Explanation

This question tests the fundamental concept of complementary events from the NCERT textbook. The context clearly states that for any event A, P(not A) = 1 - P(A). This relationship is derived from the fact that P(E) + P(not E) = 1, meaning the sum of probabilities of an event and its complement equals 1. The event 'not A' is called the complement of event A, and they are called complementary events.

Solution Steps

  1. Step 1: Given P(A) = 2/11

  2. Step 2: Using the formula P(not A) = 1 - P(A)

  3. Step 3: P(not A) = 1 - 2/11 = 11/11 - 2/11 = 9/11

PreviousNext