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## What is the probability of rolling 2 standard dice which sum up to 9?

The probability of getting 9 as the sum when 2 dice are thrown is **1/9**.

## What is the experimental probability of rolling a sum of 9?

The experimental probability of rolling a sum of 9 is **2/5**. When rolling two number cubes, there are 36 possible outcomes. The theoretical probability of rolling a sum of 9 is 4/36 or 1/9. Since 1/9 is not close to 2/5, the experimental probability is not close to the theoretical probability.

## What is the probability that the sum of the numbers on your dice is exactly 9?

There are 6*6 possible combos from two six sided dice, or 36 possibilities. If one die A is a 4, in order for the sum to be exactly 9, die B has to land on **5**. Alternatively, if die B is the one that lands on 4, then die A has to land on 5. So, there are only 2 combos that sum to 9 and have at least 1 of the die be a 4.

## What is the probability of rolling a total of 2?

Two (6-sided) dice roll probability table

Roll a… | Probability |
---|---|

2 |
1/36 (2.778%) |

3 | 2/36 (5.556%) |

4 | 3/36 (8.333%) |

5 | 4/36 (11.111%) |

## What is the formula of probability?

P(**A**) is the probability of an event “A” n(A) is the number of favourable outcomes. n(S) is the total number of events in the sample space.

…

Basic Probability Formulas.

All Probability Formulas List in Maths | |
---|---|

Conditional Probability | P(A | B) = P(A∩B) / P(B) |

Bayes Formula | P(A | B) = P(B | A) ⋅ P(A) / P(B) |

## What is the probability of getting a sum of nine when two dice are thrown?

4. What is the probability of getting a sum 9 from two throws of a dice? Explanation: In two throws of a dice, n(S) = (6 x 6) = **36**.

## What is the probability of getting a prime number from 1 to 100?

The prime numbers from 1 to 100 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97. Hence, the probability of the event that a number chosen from 1 to 100 is a prime number . Therefore, the correct option is (C).