Probability revision word search

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Fill in the blanks to complete these sentences. All the words can be found on the word search sheet. The first letter of each word has been given for you.

Question 1 a. An event with a probability of 1 is a C........................................... event. It will definitely happen.

(7 letters)

b. An event with a probability of 0 is an I..................................................... event. It will definitely not happen. (10 letters)

c. When given the probability of an event happening, the probability of it not happening is called the C....................................... probability. (13 letters)

Question 2 There are 21 sweets in a box. 14 of them are chocolate. The probability that a sweet chosen at random is not chocolate is one T.......................................... (5 letters)

Question 3 a. One card is picked from a standard pack of playing cards (no jokers). The probability of

picking an ace is one in T............................................ (8 letters)

b. The events ‘the card is red’ and ‘the card is a spade’ are M............................................. E................................................

(8 letters and 9 letters)

Question 4 The events ‘the score is odd’ and ‘the score is even’ are E............................................................... events when a fair six-sided die is thrown. (10 letters)

Question 5 One card is picked from a pack of 52 playing cards. At the same time, a fair six-sided die is thrown.

a. The events ‘the card is a diamond’ and ‘the die is odd’ are I......................................... (11 letters)

b. To calculate the probability of both events happening, we M.................................................... the probabilities of each event happening. (8 letters)

c. P(diamond card and odd die) = one E...................................................... (6 letters)

Question 6 A student travels to school by bus, bicycle, foot or car. The probability they cycle is 0.3 and the probability they walk is 0.2.

a. To calculate the probability they walk or cycle, we A............................................................... the probabilities (3 letters)

b. P(walk or cycle) = one H...................................................... (4 letters)

Probability revision word search

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Circle the words in the grid as you go.

N A Q U M U L T I P L Y E

D I B O N P F N E A I J P

Y R A T N E M E L P M O C

L L A T H I R D R C P S L

L E E Y R W A N Z I O O T

A R X E D E R E S K S N H

U A N C M M C P U A S L I

T U Q A L Z T E D N I V R

U S S R I U O D A H B L T

M E E F O F S N A X L K E

W R T Y L U O I P A E S E

E X H A U S T I V E D F N

G J H T H G I E K E L A L

Probability revision word search

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Answers

Question 1 a. An event with a probability of 1 is a CERTAIN event. It will definitely happen. (7 letters) b. An event with a probability of 0 is an IMPOSSIBLE event. It will definitely not happen. (10 letters) c. When given the probability of an event happening, the probability of it not happening is

called the COMPLEMENTARY probability. (13 letters) Question 2 There are 21 sweets in a box. 14 of them are chocolate. The probability that a sweet chosen at random is not chocolate is one THIRD. (5 letters) Question 3 a. One card is picked from a standard pack of playing cards (no jokers). The probability of

picking an ace is one in THIRTEEN. (8 letters) b. The events ‘the card is red’ and ‘the card is a spade’ are MUTUALLY EXCLUSIVE. (8 letters and 9 letters) Question 4 The events ‘the score is odd’ and ‘the score is even’ are EXHAUSTIVE events when a fair six-sided die is thrown. (10 letters) Question 5 One card is picked from a pack of 52 playing cards. At the same time, a fair six-sided die is thrown. a. The events ‘the card is a diamond’ and ‘the die is odd’ are INDEPENDENT. (11 letters) b. To calculate the probability of both events happening, we MULTIPLY the probabilities of

each event happening. (8 letters) c. P(diamond card and odd die) = one EIGHTH. (6 letters) Question 6 A student travels to school by bus, bicycle, foot or car. The probability they cycle is 0.3 and the probability they walk is 0.2. a. To calculate the probability they walk or cycle, we ADD the probabilities. (3 letters) b. P(walk or cycle) = one HALF (4 letters)