If there are 10 positive real numbers n1 < n2, n3 .... < n10 How many triplets of these numbers (n1, n2, n3) (n2, n3, n4), ... can be generated such that in each triplet the first number is always les

If there are 10 positive real numbers n1 < n2, n3 .... < n10 How ma

1.	If there are 10 positive real numbers n1 < n2, n3 .... < n10 How many triplets of these numbers (n1, n2, n3) (n2, n3, n4), ... can be generated such that in each triplet the first number is always les
A.	45
B.	90
C.	120
D.	180
Answer» D. 180