Do you mean the last two? the 9 and 10 are cut off
Answer:
The mean depends on the no. of family members but the question hasn't mentioned it. So I have no idea what to do with this.
Work:
There are six faces to a die.
Three sequences.
6*3=18.
The answer is eighteen different sequences.
In pythagoras's theorem, generally a is the shortest side, b is the second shortest and c is the hypotenuse:

. However, there is a problem. The questions aren't actually possible without using sine, cosine, and tangent (which are mathematical ratios if you didn't know). I can help you with this but it will take time explaining.
A. 3/4 • 7/8 = 21/32 < 7/8
B. 1 1/3 • 9/10 = 2 1/5 > 9/10
C. 3/4 • 7/8 = 21/32 < 7/8
D. 7/8 • 9/10 = 17/20 < 9/10
A is the correct answer.