a pair of standard dice are rolled. find the probability of rolling a sum of 3 with these dice. p(d1 + d2 =…

a pair of standard dice are rolled. find the probability of rolling a sum of 3 with these dice. p(d1 + d2 = 3) = ?

a pair of standard dice are rolled. find the probability of rolling a sum of 3 with these dice. p(d1 + d2 = 3) = ?

Answer

Explanation:

Step1: Find total number of outcomes

Each die has 6 faces. When two dice are rolled, the total number of outcomes is $6\times6 = 36$ according to the multiplication - principle.

Step2: Find number of favorable outcomes

The possible combinations to get a sum of 3 are $(1,2)$ and $(2,1)$. So the number of favorable outcomes is 2.

Step3: Calculate probability

The probability formula is $P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$. So $P(D_1 + D_2=3)=\frac{2}{36}=\frac{1}{18}$.

Answer:

$\frac{1}{18}$