SajjadAhmad wrote:
Anjeanette inserts light bulbs in a row of light sockets in the repeating pattern red bulb, white bulb, white bulb, red bulb, white bulb, and white bulb. If she inserts a total of n red bulbs in the row, including the first and last bulbs, how many white bulbs did she insert in the row?
A. 2n − 2
B. 2n − 1
C. 2n + 1
D. 3n − 2
E. 3n + 1
The pattern is as follows
RWWR----------------2R 2W
RWWRWWR----------3R 4W
RWWRWWRWWR----4R 6W
this pattern is given by 2n-2 for a total of n red bulbs in the row, including the first and last bulbs
Hence option A is correct
Hit Kudos if you liked it