I need help with this

10 coins:

# of heads: 6

# of tails : 4

heads 6/10

tails 4/10

20 coins:

# of heads: 8

# of tails : 12

heads 8/20

tails 12/20

30 coins:

# of heads: 18

# of tails : 12

heads 18/30

tails 12/30

A. heads: 32 tails: 28

B. heads:30 tails: 30

C. Sometimes probability is wrong but it is a good way to guess the outcome.

5

step-by-step explanation:

step-by-step explanation:

no, her answer is not correct.   we square the lengths of all sides and then determine whether the pythagorean theorem holds here:

9² + 15² = 306.   this is not equal to the square of the longest side ( that square being 395.   answer c is correct.