Question

In a class there are 45 students in the 1st row. 41 students in the second row, 37 students in the third row and 5 students in the last row . How many rows are there...

Answer 1

Answer:11

Step-by-step explanation:

the number of students in each row is an ap with first term a=45, cd= -4 and nth term = 5 where we need to find the n

nth term = a+(n-1)d=5

45 + (n-1) (-4) =5

4n = 45+4-5=44

n=11

so there are 11 rows in the class

Answer 2

Here is your answer!

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