In a playground,there are 43 students in the first row,38 students in the second row,33 students in the third row .There are 3 students in the last row.how many rows are there in the playground?
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hiwait for awhile i will send you after some time....
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a=43,d=38-43= -5
n= (l-a) / d+1
= (3-43)/(-5) +1
= 8+1= 9 9 rows
n= (l-a) / d+1
= (3-43)/(-5) +1
= 8+1= 9 9 rows
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