If 8 rooms don’t have hot shower how many blue rooms have hot shower?
In a 60-room building there are 10 more blue than white rooms. 80% of white rooms has hot showers.
No. of white rooms—w:
w + 10 + w = 60
2w = 50
w = 25
No. of white rooms with hot shower:
= 0.8(25)
= 20
No. of hot [...]