যদি \(A=\dfrac{1}{30}+\dfrac{1}{20}+\dfrac{1}{42}\:and\:Y=\dfrac{1}{56}+\dfrac{1}{72}+\dfrac{1}{90}\) হয়, তাহলে A + Y এর মান নির্ণয় করুন।

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

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