The Probability of an event NOT Happening I have a box of 7 different CDs, 3 are music CDs. What is the probability of NOT picking a music CD? In how many ways can I NOT pick a music DVD? 4/7

The Probability of an event NOT Happening Question: What is the relationship between P(Music CD) = 3/7 and P(NOT Music CD) = 4/7 ? They add up to 1  𝟑 𝟕 + 𝟒 𝟕 = 𝟕 𝟕 =𝟏 P(NOT Music CD) = 1 – P(Music CD) = 7/7 – 3/7 = 4/7 IN GENERAL The probability of an event NOT happening is found by deducting from 1 the probability of that event happening! (finding the COMPLEMENT!) Minn kollha han nehhi 3 (kollha = 7/7 = 1

Probability of an event not happening 1 – Probability of EVENT happening Worksheet

Probability - Find the probability of things NOT happening 10 multiple choice questions

1 out of 8 A) B) C) D) evens unlikely 7 out of 8 1 out of 8 If the Probability of an event happening is: 1 out of 8 What is the probability of the event NOT happening? evens unlikely A) B) 7 out of 8 1 out of 8 C) D)

3 out of 7 A) B) C) D) likely 4 out of 7 3 out of 7 7 out of 3 If the Probability of an event happening is: 3 out of 7 What is the probability of the event NOT happening? likely 4 out of 7 A) B) 3 out of 7 7 out of 3 C) D)

13 out of 20 A) B) C) D) 20 out of 13 unlikely 7 out of 10 7 out of 20 If the Probability of an event happening is: 13 out of 20 What is the probability of the event NOT happening? 20 out of 13 unlikely A) B) 7 out of 10 7 out of 20 C) D)

If the Probability of an event happening is: 0.2 What is the probability of the event NOT happening? 0.8 99.8 A) B) 0.18 0.2 C) D)

If the Probability of an event happening is: 0.6 What is the probability of the event NOT happening? 0.7 0.3 A) B) 0.5 0.4 C) D)

If the Probability of an event happening is: 0.85 What is the probability of the event NOT happening? 0.20 0.15 A) B) 0.2 0.25 C) D)

If the Probability of an event happening is: 0.25 What is the probability of the event NOT happening? 0.65 0.75 A) B) 0.85 0.70 C) D)

If the Probability of an event happening is: 0.44 What is the probability of the event NOT happening? 0.55 0.46 A) B) 0.66 0.56 C) D)

If the Probability of an event happening is: 0.01 What is the probability of the event NOT happening? 0.9 0.09 A) B) 0.99 0.999 C) D)

If the Probability of an event happening is: 0.97 What is the probability of the event NOT happening? 0.03 0.13 A) B) 0.3 3 C) D)

A bag contains blue, red and green cards only A bag contains blue, red and green cards only. One card is taken at random from the bag. The table shows the probabilities of taking a blue card and a red card. Fill in the gap: Colour Blue Red Green Probability 2 5 𝑜𝑟 0.4 1 2 𝑜𝑟 0.5   𝟏 𝟏𝟎 𝒐𝒓 𝟎.𝟏

The probability of each student being picked for a race is given below The probability of each student being picked for a race is given below. Fill in the gap! Name Josh Brian Matt Luke David Probability 0.32 0.1 0.21   0.31 0.06

Pg 43-44 Exercise 2a No. 13-16 (all parts please) Homework Pg 43-44 Exercise 2a No. 13-16 (all parts please)