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যদি $A = \{x: x$ হলো $5$, $7$ দ্বারা বিভাজ্য এবং $x < 150 \}$ হয় তবে $P(A)$ এর সদস্য সংখ্যা কত?

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P(A) = {$\varnothing$, {35}, {70}, {105}, {140}, {35,70}, {35,105}, {35,140}, {70,105}, {70,140}, {105,140}, {35,70,105}, {35,70,140}, {35,105,140}, {70,105,140}, {35,70,105,140}}

সুতরাং $A = \{x: x$ হলো $5$, $7$ দ্বারা বিভাজ্য এবং $x < 150 \}$ হয় তবে $P(A)$ এর সদস্য সংখ্যা $16$

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