Answer:

Step-by-step explanation:
Answer:
Step-by-step explanation:
............................................ (1)
............................................ (2)
now equate both (1) and (2)



now substitute the values of x ,
when
, y becomes 0
when
, y becomes 8
so, solution set:
and 
Try 18mm that should be the answer
The probability of getting the same number of heads and tails is3/8