Answer:
9/19
Step-by-step explanation:
Total number of ball=19
even ball=2,4,6,8,10,12,14,16,18
total number of even ball=9
total number of ball 10=1
Now, in probability, the probability of event A OR event B happening is the probability of event A plus the probability of event B minus the probability of both A AND B.
Let A be the event of drawing an even number.
Let B be the event of drawing a 10.
In this case then, we are drawing 1 ball only.
P(A)=9/19
P(B)=1/19
P(A and B)=1/19 (because 10 is both 10 AND an even number)
Then P(A or B)=P(A)+P(B)-P(A and B)
P(A or B)=9/19+1/19-1/21
P(A or B)=9/19
