2.3.2. [DEL] a3c0
2.3.2. Sample B
B4:
in the case of A2
one lamp more than 0 per cent
but not more than20 per cent
one lamp more than20 per cent
B5:
in the case of A2
both lamps more than20 per cent
B6:
in the case of A2
one lamp0 per cent
one lamp more than30 per cent 		a0c0