Probability
Types of exercises: probability in the classical model, complementary event, throwing two dice, drawing several items at once, drawing twice with and without replacement, drawing a number from a set.
Exercises are drawn at random from a large bank - every click gives a different set.
Narrow the topic
Solved: 0 of 10
Give the probability
Two numbers are drawn one after another without replacement from the set {2, 3, 4, …, 10}. What is the probability that the product of the numbers drawn is divisible by 4?
Give the probability
A box holds 17 white balls and 11 black balls. One ball is drawn at random. What is the probability that it is NOT white?
Give the probability
Two 12-sided dice are thrown. What is the probability that both dice show the same number?
Give the probability
A box holds 4 white balls and 13 black balls. One ball is drawn at random. What is the probability that it is black?
Give the probability
A box holds 5 white balls and 6 black balls. Two balls are drawn at once. What is the probability that both are white?
Give the probability
A number is drawn at random from the set of all two-digit numbers. What is the probability that the number drawn is the square of a natural number?
Give the probability
Two numbers are drawn one after another without replacement from the set {5, 6, 7, …, 16}. What is the probability that the sum of the numbers drawn is odd?
Give the probability
A box holds 16 white balls and 16 black balls. One ball is drawn at random. What is the probability that it is NOT white?
Give the probability
Two dice are thrown. What is the probability that the pips add up to at least 6?
Give the probability
A box holds 4 white balls and 8 black balls. One ball is drawn at random. What is the probability that it is white?
This address is one particular set - everyone who opens it gets exactly the same exercises. Copy the link from the address bar and send it to the class. You can generate a new set at the top of the page.
PhiBoard is a free online whiteboard for maths
These exercises are part of it. On the board itself you can plot a function, write a formula in LaTeX, or solve a problem together with a teacher or a friend - live, in the browser. Our app is completely free.