basic probability

Front

What is probability?

Back

Probability is a measure of the likelihood that an event will occur, expressed as a number between 0 and 1.

Front

What is the probability of rolling an odd number on a standard six-sided die?

Back

The probability of rolling an odd number (1, 3, or 5) is 3/6 or 1/2.

Front

What is the total number of outcomes when rolling a six-sided die?

Back

There are 6 possible outcomes when rolling a six-sided die.

Front

What is the probability of rolling a number less than 7 on a standard die?

Back

The probability is 1, since all possible outcomes (1 to 6) are less than 7.

Front

How many aces are in a standard deck of cards?

Back

There are 4 aces in a standard deck of 52 cards.

Front

What is the probability of drawing an ace from a standard deck of cards?

Back

The probability of drawing an ace is 4/52, which simplifies to 1/13.

Front

In a jar with 2 pink, 6 red, and 4 blue marbles, what is the total number of marbles?

Back

The total number of marbles is 2 + 6 + 4 = 12.

Front

What is the probability of picking a red or blue marble from the jar?

Back

The probability of picking a red or blue marble is (6 red + 4 blue) / 12 total = 10/12 = 5/6.

Front

What is the probability of rolling a number greater than 3 on a six-sided die?

Back

The numbers greater than 3 are 4, 5, and 6, so the probability is 3/6 or 1/2.

Front

What is the probability of rolling an odd number or a number greater than 3 on a die?

Back

The odd numbers are 1, 3, 5 and the numbers greater than 3 are 4, 5, 6. The combined outcomes are 1, 3, 4, 5, 6, giving a probability of 5/6.