Question

question 5
2 pts
a box contains 40 balls, including 10 red balls, 10 green ball, 10 yellow balls, and 10 blue balls. how to calculate the probability of randomly picking a red ball?
1/40
10/40
20/40
40/40

Explanation:

Step1: Recall probability formula

The probability formula is $P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$.

Step2: Identify favorable and total outcomes

The number of red balls (favorable outcomes) is 10, and the total number of balls is 40.

Step3: Calculate probability

$P(\text{picking a red ball})=\frac{10}{40}$.

Answer:

B. 10/40