Find the probability.
-A lottery game has balls numbered 1 through 21. What is the probability of selecting an even numbered ball or a 8?
A) 10
B) $\frac { 10 } { 21 }$
C) $\frac { 8 } { 21 }$
D) $\frac { 21 } { 8 }$

Question

Find the probability.
-A lottery game has balls numbered 1 through 21. What is the probability of selecting an even numbered ball or a 8? 
A) 10
B) $\frac { 10 } { 21 }$
C) $\frac { 8 } { 21 }$
D) $\frac { 21 } { 8 }$

Quizplus · Accepted Answer

The total number of balls is 21. There are 10 even numbered balls (2, 4, 6, 8, 10, 12, 14, 16, 18, 20). Since 8 is also even, it's already counted among the even numbers, so we don't add it again. Therefore, the probability is $ \frac { 10 } { 21 } $.

Find the Probability 1021\frac { 10 } { 21 }2110​ C) 821\frac { 8 } { 21 }218​

Find the Probability $\frac { 10 } { 21 }$ C) $\frac { 8 } { 21 }$