7) B
Only the first digit (8) was faulty and three lights were permanently on.
So we need to look at which numbers can be formed from 8.
0 can be formed if we take out 1 light from 8.
2 can be formed if we take out 3 lights from 8.
Only the first digit (8) was faulty and three lights were permanently on.
So we need to look at which numbers can be formed from 8.
0 can be formed if we take out 1 light from 8.
2 can be formed if we take out 3 lights from 8.
5 can be formed if we take out 3 lights from 8.
6 can be formed if we take out 3 lights from 8.
9 can be formed if we take out 3 lights from 8.
However, the maximum score is 505.
So the actual score could have been:
005
205
6 can be formed if we take out 3 lights from 8.
9 can be formed if we take out 3 lights from 8.
However, the maximum score is 505.
So the actual score could have been:
005
205
It could not have been 505, 605 or 905.
There could have been 2 different values for the actual score.