Answer:
B
Step-by-step explanation:
Answer: a. 10%
Step-by-step explanation:
Girls in the class = 40%
Girls play tennis = 25%
Percentage of class play tennis = 40%*25% = 0.4*0.25 = 0.1
Percentage of class play tennis = 10%
Answer:

Step-by-step explanation:
Given


Required
Solve graphically
See attachment for graph;
The black shade represents
While the green, represents 
Next, determine the intersection points between the two lines
From the attached graph, we have:

<em>Hence, the solution is:</em>