Answer:
16263 ways
Step-by-step explanation:
Given that:
Number of coin tosses, n = 15
Number of heads is between 8 and 12 inclusive
For 8 heads, tails = 15 - 8 = 7
15! / (8!7!) = 6435
For 9 heads, tails = 15 - 9 = 6
15! / (9!6!) = 5005
For 10 heads, tails = 15 - 10 = 5
15! / (10!5!) = 3003
For 11 heads, tails = 15 - 11 = 4
15! / (11!4!) = 1365
For 12 heads, tails = 15 - 8 = 3
15! / (12!3!) = 455
(6435 + 5005 + 3003 + 1365 + 455) = 16,263 ways
