Question

1. a single marble is drawn from a jar containing 20 marbles, as shown below:

2a what is the probability of drawing a black marble? express your answer as a percentage.
probability = \frac{7}{20} \cdot 100\\%
explain
probability = enter your next step here

Explanation:

Step1: Calculate the fraction value

First, we calculate the value of the fraction $\frac{7}{20}$.
$\frac{7}{20}= 7\div20 = 0.35$

Step2: Convert to percentage

Then we multiply this decimal by $100\%$ to get the percentage.
$0.35\times100\% = 35\%$

Answer:

$35\%$