The first answer is 1120,467,654,444,800
the second answer is 17,183,431,198,720
You can use midpoint formula
M=x1+x2/2 , y1+y2/2
M=-2+4/2 , 2+2/2
M= 1,2
Answer:

Step-by-step explanation:
From the question we are told that:
Percentage of audience in first concert 
Percentage of audience in second concert 
Percentage of audience in third concert 
Audience Percentage at at-least one concert 
Percentage of audience at first & second concert 
Percentage of audience in first & third concert 
Percentage of audience in second & third concert 
Generally the equation for probability of attending all concerts
is mathematically given by




Therefore the probability that a randomly selected audient attended all the concerts

B. and D. For the both I'm most likely sure