CBSE Class 10 Answered
Let the four numbers be
a-3d,a-d,a+d,a+3d (imp step)
acc to qn
Let d be positive, then the greatest number is a+3d
least number is a-3d
acc to qn
so the numbers in A.P. are
we see that their sum is 50
the greatest number i.e. 20 is four times the smallest number i.e. 5
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