7th Grade Probability Worksheets with Answers

Are you a 7th grade math teacher or parent looking for probability worksheets with answers? If so, you've come to the right place. In this blog post, we will discuss a collection of probability worksheets specifically designed for 7th graders. These worksheets cover various topics related to probability and come with answer keys to help you easily assess your students' understanding. Let's dive in and explore these engaging resources for your middle schoolers.

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What is the probability of flipping a fair coin and getting heads?

The probability of flipping a fair coin and getting heads is 1/2, or 50%. This is because there are only two possible outcomes - heads or tails - and they are equally likely to occur when the coin is flipped.

If there are 5 red balls and 3 blue balls in a bag, what is the probability of selecting a blue ball randomly?

The probability of selecting a blue ball randomly from a bag containing 5 red balls and 3 blue balls is 3/8, which can be calculated by dividing the number of blue balls by the total number of balls in the bag (3 blue balls out of a total of 8 balls).

A standard deck of cards contains 52 cards. What is the probability of drawing a heart or a diamond?

There are 26 cards that are hearts or diamonds in a standard deck of cards, as there are 13 hearts and 13 diamonds. So, the probability of drawing a heart or a diamond from a standard deck of cards is 26/52, which simplifies to 1/2 or 50%.

If a spinner is divided into 8 equal sections, with 3 sections colored red and the rest colored blue, what is the probability of landing on red?

The probability of landing on red when spinning the spinner is 3 out of 8, or 3/8.

In a game, you roll two dice. What is the probability of rolling two even numbers?

The probability of rolling two even numbers on two dice would be calculated by first determining the number of favorable outcomes (rolling 2, 4, or 6 on both dice) and then dividing by the total number of possible outcomes when rolling two dice, which is 36 (6 sides on each die). There are 9 favorable outcomes (3 even numbers on 2 dice) out of 36 total outcomes, so the probability would be 9/36 or 1/4, which simplifies to 0.25 or 25%.

If a jar contains 10 red marbles, 5 blue marbles, and 3 green marbles, what is the probability of randomly selecting a blue or a green marble?

The probability of randomly selecting a blue or a green marble from the jar is calculated by adding the individual probabilities of selecting a blue marble and a green marble. The total number of blue and green marbles is 5 + 3 = 8, and the total number of marbles in the jar is 10 + 5 + 3 = 18. Therefore, the probability is 8/18, which simplifies to 4/9 or approximately 44.44%.

A bag contains 12 candies, 4 of which are chocolate. What is the probability of selecting a chocolate candy without looking?

The probability of selecting a chocolate candy from the bag without looking is 4/12, which simplifies to 1/3 or approximately 0.33.

In a deck of playing cards, what is the probability of selecting a black card less than 10?

There are a total of 26 black cards (13 Spades and 13 Clubs) and 36 cards that are less than 10 (2-9 of each suit and 3 more in case of diamonds). There are 7 black cards that are less than 10- two black 2's and 5 black 3's. So, the probability of selecting a black card less than 10 is 7/52, which simplifies to 1/13.

A pack of 30 cards has 7 red cards, 15 blue cards, and 8 green cards. What is the probability of drawing a red or a green card?

The total number of red and green cards in the pack is 7 + 8 = 15 cards. The probability of drawing a red or green card is then 15/30 = 0.5, or 50%.

You randomly choose a letter from the word "PROBABILITY". What is the probability of selecting a vowel?

The word "PROBABILITY" contains four vowels out of a total of ten letters. Therefore, the probability of selecting a vowel from the word "PROBABILITY" is 4/10 or 2/5, which simplifies to 0.4 or 40%.