Question 1:
In a school science fair, there were exhibits from class A , class B and class C. Altogether, 25 exhibits came from class B and class C. In a total of 16 exhibits were not from class C and a total of 15 exhibits were not from class B.
How many exhibits were there altogether?
Solution:
16 exhibits not from C --> A + B = 16
15 exhibits not from B --> A + C = 15
2A + B + C = 31
B + C = 25
2A --> 6
A --> 3
B --> 13
C --> 12
Total exhibits --> 3 + 13 + 12 = 28
Question 2:
The length of a rectangular pond is 14 m and its breadth is 7 m. Fatimah wants to build a running path around the pond. The width of the path is 1/2 m. what is the area of the running path?
Solution:
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