The 20th term of Arithmetic Progression from ending is
(a) 155 (b) 265 (c) 65 (d )165
If AP is 22,25,28,31,--------322.
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3
Given,
a=322
d=25-22
=3.
s(n)=a+(n-1)d
322+(20-1)-3
322+(19)-3
322-57
265
option b is the correct answer
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