Bradley owns b video game cartridges. If Bradley’s total is one-sixth the total owned by Andrew and four times the total owned by Charlie, how many video game cartridges do the three of them own altogether, in terms of b? Choose the correct choice from the following choices
A) 23b / 4
B) 25b / 4
C) 27b / 4
D) 29b / 4
E) 31b / 4
b = Bradley’s total   6b = Andrew’s total   b/4 = Charlie’s total   The total number of cartridges is:   b + 6b+ b/4 = (4b + 24b + b) / 4 = 29b / 4   The answer is 29b / 4.
<result>D</result>
Bradley owns b video game cartridges. If Bradley’s total is one-sixth the total owned by Andrew and four times the total owned by Charlie, how many video game cartridges do the three of them own altogether, in terms of b?