20+9=29
20-9=11
The answer is 20 and 9. Hope this helps.
Answer:
Below.
Step-by-step explanation:
About x3 bigger then figure b.
Answer:
a) 
b) 
Step-by-step explanation:
Number of balls in the urn = 12
Number of white balls in the urn = 4
So, number of balls which are not white = 12 - 4 = 8
We know that probability = No. of outcomes/Total number of outcomes
Let
denotes the event of getting white ball by A, B and C
a) each ball is replaced after being drawn.
Probability = Number of white balls/Total number of balls
Solution: 
b)the balls that are withdrawn are not replaced.
Solution:
If A wins: 
If A lost and B wins: 
If A and B lost and C wins: 
and so on....
Answer:
AD=AC (as D is midpoint to from line AC the line AD=AC
Step-by-step explanation:
HENCE PROVED