Question

why @agent0smith

Answer 1

http://prntscr.com/b0b406

Answer 2

Why what?

Answer 3

i dont understand how they got that

Answer 4

Look at the scored first circle. Add up all the numbers in it. Do the same for the won circle.

Answer 5

are you still stuck ?

Answer 6

To define an event you draw a circle


if you have more events ( subsets of the main sample space) and there is a probability that both can happen at the same time ( you intersect the circles other wise not) like

A = { 1,2 ,3}
B= { 99, 88, 77}
C= { 2, 5)

A intersect B = {} < empty set no items so you don't intersect the circles.

However ,

A intersect C = {2} so A and C can happen in the same time if 2 is chosen.