The correct answer would be Five. (I just answered this question on my quiz)
Answer:
The value is 
Step-by-step explanation:
From the question we are told that
The number of times is n = 20
The probability of getting three or more heads in a row is
The probability of getting three or more heads in a row or three or more tails in a row is 
Generally given that it is a fair coin , then 
Here P(T) is probability of getting three or more tails in a row
Generally the probability of getting three or more heads in a row and three or more tails in a row is mathematically represented as

=> 
=> 
Its not atleast it shouldnt be 2 3/3 is the same as 3 and 14/5 is 2 4/5
Part A:
A). Equilateral Isosceles
B). Right isosceles
C). Obtuse scalene
Part B:
F and E
Plz mark me brainliest