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1st row=7-3=4
2nd row=7
3rd row=10
4th row=13
5th row=16
Students altogether=16+13+10+7+4=50
Answer: 50 students
2nd row=7
3rd row=10
4th row=13
5th row=16
Students altogether=16+13+10+7+4=50
Answer: 50 students
The answer is correct but it is singers instead of students.
Thanks