\(A=\dfrac{1}{30}+\dfrac{1}{20}+\dfrac{1}{42}\:and\:Y=\dfrac{1}{56}+\dfrac{1}{72}+\dfrac{1}{90}\)అయితే A + Y విలువ?.

1
21 / 140
2
21 / 160
3
23 / 150
4
23 / 140

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