<span>A tape diagram, also known as a bar model, is a pictorial representation of ratios. In mathematics education, it is used to solve word problems. So lets do this problem that has been gave to us by teachers all around.</span><span>
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&cad=rja&uact=8&ved=0ahUKEwiNpuuZzK_X....</span>
Answer:
0.0105
Step-by-step explanation:
given that 30% of all houses need a paint job. Also, 15% of all houses need both a paint job and a new roof. Further, 7% of all houses that need a new roof also need new windows.
If total houses are 100, then 30 require a paint along. 15 require both paint and new roof.
Out of 15 houses which require new roof 7% need new windows
i.e. no of houses which need new windows = 
If there are total 100 houses, 1.05 houses require a new window
So probability that a randomly selectede house needs a new window
= 0.0105
So you swap sides and you have 3x=93 and then you divide 3 by 93 and you get x=31
The work is down below. your answer is m=8.