7×6×5×4×3×2×1+5 can be written as 5*[7*6*5*4*3*2*+1] or 5*(1009). So, other than the number and 1, it has 5 and 1009 as its factors too. So it is a composite number.
Step-by-step explanation:
A composite number is a positive integer that has a factor other than 1 and itself.
I think it’s A. If the first event is 3/5 and the second event is 3/5×2/5, the third will be 3/5(2/5)²=0.096, and the fourth will be 3/5(2/5)³=0.0384 so the 5th will be 3/5(2/5)⁴=0.01536.
