Answer:
1) B, D
2) A, C, D
3) B, C
Explanation:
Question 1)
Option A is 1/5+ 1/5+ 1/5+ 1/5+ 1/5 = 5/5 or 1, not 3/5. Hence the answer can't be Option A.
Option B is 1/5+ 1/5+ 1/5 = 3/5. Hence the answer can be is Option B.
Option C is 2/5+ 1/5+ 1/5 = 4/5, not 3/5. Therefore the answer can't be Option C.
Option D is 2/5+ 1/5 = 3/5. Therefore the answer can be Option D.
In Summary, for Question 1, the answer is Option B and Option D.
Question 2)
Option A is 2/10+ 2/10+ 5/10 = 9/10. Therefore the answer can be Option A.
Option B is 5/10+ 5/10+ 1/10 = 11/10 or 1 1/10. Hence, the answer can't be Option B.
Option C is 1/10+ 1/10+ 7/10 = 9/10. Therefore the answer can be Option C.
Option D is 8/10+ 1/10 = 9/10. Hence the answer can be Option D.
In Summary, for Question 2, the answer is Option A, Option C and Option D.
Question 3)
Option A is 2/8+ 2/8+ 2/8 = 6/8. So, the answer can't be Option A.
Option B is 2/8+ 1/8+ 2/8 = 5/8. So, the answer can be Option B.
Option C is 2/8+ 3/8 = 5/8. Hence, the answer can be Option C.
Option D is 2/8+ 2/8+ 2/8+ 2/8 = 8/8 or 1. Therefore, the answer cannot be Option D.
In Summary, for Question 3, the answer is Option B and Option C.