確率問題

単一事象、複合事象、非復元抽出を、正確な分数の答えとともに。

サイコロやコインのような単一事象の確率、サイコロの合計やカード抽出のような複合事象の確率、そして袋からのビー玉の非復元抽出をカバーしています。

ソルバーに確率の問題を入力してください。

採点付きのアダプティブな確率練習。

素早い確率の計算。

確率の例題

以下の例題は現在、英語のみで提供されています。

1. A card is drawn at random from a standard 52-card deck. What is the probability it is a heart?+

答え: 1/4

Step 1: A standard deck has 4 suits of 13 cards each, so there are 13 hearts out of 52 cards. Step 2: Probability = 13/52 = 1/4.

2. Two fair six-sided dice are rolled. What is the probability that the sum is 7?+

答え: 1/6

Step 1: There are 6 × 6 = 36 equally likely outcomes for two dice. Step 2: 6 of those outcomes add up to 7. Step 3: Probability = 6/36 = 1/6.

3. Two fair six-sided dice are rolled. What is the probability that the sum is 3?+

答え: 1/18

Step 1: There are 6 × 6 = 36 equally likely outcomes for two dice. Step 2: 2 of those outcomes add up to 3. Step 3: Probability = 2/36 = 1/18.

4. Two fair six-sided dice are rolled. What is the probability that the sum is 4?+

答え: 1/12

Step 1: There are 6 × 6 = 36 equally likely outcomes for two dice. Step 2: 3 of those outcomes add up to 4. Step 3: Probability = 3/36 = 1/12.

5. Two fair six-sided dice are rolled. What is the probability that the sum is 6?+

答え: 5/36

Step 1: There are 6 × 6 = 36 equally likely outcomes for two dice. Step 2: 5 of those outcomes add up to 6. Step 3: Probability = 5/36 = 5/36.

6. Two fair six-sided dice are rolled. What is the probability that the sum is 8?+

答え: 5/36

Step 1: There are 6 × 6 = 36 equally likely outcomes for two dice. Step 2: 5 of those outcomes add up to 8. Step 3: Probability = 5/36 = 5/36.