CET2 Revision

A box contains 10 number cards labeled from 1 to 10. If a card is drawn at random, what is the probability that the number on the card is prime number.

• @@rac{4}{10}@@

• @@rac{3}{10}@@

• @@rac{5}{10}@@

• @@rac{2}{10}@@

A basketball player scored the following points in four games: 10, 15, 14, 13. What is the player’s average score per game?

• 12

• 13

• 14

• 15

Jota rolls a fair six-sided dice. Jota says, ‘I am less likely to roll a 5 than any of the other numbers on the dice.’ Explain why Jota is wrong.

• Jota is wrong because each number (1, 2, 3, 4, 5, and 6) has an equal probability of being rolled.

• Jota is correct because rolling a 5 is less likely than rolling a 1, 2, 3, 4, or 6.

• The probability of rolling a 5 is @@rac{1}{12}@@.

• The probability of rolling a 5 is @@rac{1}{3}@@.

Two fair six-sided dice are rolled. What is the probability of getting A sum of 3?

A fair six-sided die is rolled. What is the probability of rolling a 5 or a 4?

Ahmed counts the types of vehicles that pass his school on one day. He records the data on a waffle diagram. Ahmed says, ‘If we count for half an hour, instead of one day, the waffle diagram will be the same.’ Explain why Ahmed could be wrong.

• Traffic patterns remain constant throughout the day, so the waffle diagram will be the same.

• Counting for half an hour will capture all types of vehicles that pass in a day.

• Traffic changes throughout the day, leading to different counts and types of vehicles.

• The waffle diagram is only affected by the total number of vehicles counted.

A student scored the following marks in five tests:
      75, 85, 85, 80, 75
       What is the student’s average score?

• 78

• 80

• 82

• 75

Ota and Jota roll two fair six-sided dice. How many different outcomes are possible?

• 12

• 24

• 30

• 36

What is the probability of rolling an even number on a fair six-sided die?

If two fair six-sided dice are rolled, what is the probability of getting a sum of 4?