MBA Exam

If A1=5 and A19=205 , A1 and A19 are the terms of an AP. Then find the value of A1+A3+ ..... +A17+A19?

1) 1050
2) 210
3) 840
4) 945

Read Solution (Total 1)

1050

v hv formula as N/2(a1+a[last])
so v have 10 numbers 1 to 19.
as alternately given 1,3,5,7....17,19
therefore,
N=10,a1=5 a19=205
10/2(5+205)
==>5*210
==>1050
11 years agoHelpfull: Yes(1) No(0)

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