Solution:
Two digit positive numbers which when divided by 7 yield 2 as remainder are 12 terms i.e, 16,23,30,...,93
Two digit positive numbers which when divided by 7 yield
5 as remainder are 13 terms i.e ,12,19,26,...,96
By using AP sum of 16,23,...,93, we get
S1=16+23+30+...+93=654
By using AP sum of 12,19,26,...,96, we get
S1=12+19+26+...+96=702
∴ required Sum=S1+S2=654+702=1356
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