Probability - practice for 12 year olds
Number of problems found: 39
- A band
A band played an encore at 2 of its last 4 shows. Considering this data, how many of the band's next 14 shows would you expect to have an encore? - Probability 81964
Calculate the probability of the event that you sit in seats 1 to 30 in the cinema at: a) seat marked with a prime number b) seat marked with an even number c) a seat marked with a number divisible by 3 or 4 - Probability 81117
Martin forgot the 4-digit PIN, and he remembered the first three numbers. The fourth number is odd. What is the probability in % that he will be able to determine the PIN? He has only one attempt. - Probability 80825
What is the probability that two fives are rolled when two dice are rolled if we know that the sum of both numbers is divisible by five? - Probability 80394
We have 10 red and 10 white balls. We will take 5 white. What is the probability of picking a white ball? - Strawberry 71664
The opaque package contains five lemons, six apples, and three strawberry candies. At least how many sweets do we have to choose so that there is at least one strawberry among them? - Probability 65464
We randomly draw one out of 18 cards with numbers from 1 to 18. What is the probability that the ticket drawn is a prime number? Write the result as a decimal number rounded to two decimal places. - What fraction
What fraction of numbers 1 to 30 is prime? - In PE
In PE, students play a game where they do different exercises depending on the color of marble that Coach Forbes draws. Coach Forbes has a jar with 6 red marbles, 12 blue marbles, 16 purple marbles, two green marbles, and four yellow marbles. What is the - Two dice
What is the probability that when the roll of two identical dice is the sum of points 7? - The dice
Find the probability that a number divisible by two or three will fall when the dice are rolled. - Double six-six
What is the probability that a player in the games of ludo will throw a double six twice? - Two dice
We roll two dice. What is the probability that the sum of the falling numbers is greater than 3? - Probability 41101
What is the probability of a random event A that a) an even number, b) a number divisible by three, c) a number greater than six will fall on the dice roll. - Entertainment 41081
In the entertainment lottery, they draw one number from 1 to 35. What is the probability that they will draw an odd compound number? - Probability 41071
Six boys and nine girls played in the school group. What probability will they point to the boy when they are reproached? - The box
Does the box contain three light bulbs with a wattage of 40 W and two pieces of light bulbs with a wattage of 60 W. What is the probability of the event that two randomly selected light bulbs will both be 40 W? - Probability 13973
There are three types of pinwheels on the tray, two caramel, four coffee, and one vanilla. Jurko chose one dessert. What is the probability that he decided on a coffee pinwheel? - Probability 8408
From the group of 18 players I am, the coach selects nine players. What is the probability that I will be among the players chosen? - Generated 8349
The numbers 1,2,3,4,5 are given. Role: a) how many 4-digit numbers can we create if the digits cannot be repeated? b) how many generated numbers will not contain the digit 1? c) How many of the generated numbers will be divisible by 5? d) How many of the
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