The total number of light bulbs in the 20 lamps is 20*7 = <<20*7=140>>140

If 1/4 of the 20 lamps have burnt-out light bulbs, there are 1/4*20 = <<1/4*20=5>>5 lamps with burn out light bulbs

Since each of the 5 lamps has 2 burnt-out light bulbs, the number of burn out light bulbs is 2*5 = <<2*5=10>>10

The number of working light bulbs is 140 -10 = <<140-10=130>>130

# Answer

130
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Reyna had 20 lamps with seven light bulbs in each lamp. If 1/4 of them have 2 burnt-out light bulbs each, how many light bulbs are working?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
130
Reyna had 20 lamps with seven light bulbs in each lamp. If 1/4 of them have 2 burnt-out light bulbs each, how many light bulbs are working?
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