SOLUTION: A grocery clerk sets up a display of 12-pack cartons of cola. There are 15 cartons at the base of the triangle and one at the top. How many cartons of cola are needed for the compl
Algebra ->
Sequences-and-series
-> SOLUTION: A grocery clerk sets up a display of 12-pack cartons of cola. There are 15 cartons at the base of the triangle and one at the top. How many cartons of cola are needed for the compl
Log On
Question 754449: A grocery clerk sets up a display of 12-pack cartons of cola. There are 15 cartons at the base of the triangle and one at the top. How many cartons of cola are needed for the complete display?
A.180
B.30
C.120
D.15 Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A grocery clerk sets up a display of 12-pack cartons of cola. There are 15 cartons at the base of the triangle and one at the top. How many cartons of cola are needed for the complete display?
1+2+3+...+13+14+15
= (15/2)(1+15) = 15*8 = 120
=================================
cheers,
Stan H.
====================
A.180
B.30
C.120
D.15
(