Suppose you roll a special 5-sided die. What is the probability that the number rolled is a "1" OR a "2"? Round to 3 decimal places___.

Question

asked Aug 23, 2023 7.7k views

1 Answer

Nagarjun Prasad · Answer 1 · 2023-08-29T17:23:36+0000

Let:

A = Roll a 1

B = Roll a 2

m = Number of favourable outcomes

n = Total number of outcomes

So:

$\begin{gathered} P(A)=(m)/(n)=(1)/(5) \\ P(B)=(m)/(n)=(1)/(5) \\ \end{gathered}$

Since the events are mutually exclusive:

$P(A\cup B)=P(A)+P(B)=(1)/(5)+(1)/(5)=(2)/(5)=0.400$

Answer:

0.400