Answer:
Step-by-step explanation:
Let heads be the number of males
Let tails be the number of females.
There are 8 ways a family of 3 could be described.
H H H
H H T
H T H
H T T
T H H
T H T
T T H
T T T
So H T H means the oldest child is a male the middle child is a female and the youngest child is H which is a male.
50/50 chance for all 3 children
120
because 12X10 is 120 and he has 12 groups of 10
Answer: m = 19