Question

Can someone help me on my last problem? #10

Answer 1

Ok but what did i do wrong and if you never studied the subject how did you know i was wrong

Answer 2

Based on my small expertise in this subject,

the answer should be 1/(20)^22


the logic is the same as a coin flip
1st flip: call for heads, 1/2 chance
2nd: call for heads, (multiply by self) 1/2 x 1/2= 1/4 chance
3rd: heads, 1/4 x 1/2= 1/8
and so on...