Let $A={1,2,3,\ldots \ldots .,10}$ and $B=\left\{\frac{m}{n}: m, n \in A, m

Question

Let $A={1,2,3,\ldots \ldots .,10}$ and $B=\left\{\frac{m}{n}: m, n \in A, m<n\right.$ and $\left.\operatorname{gcd}(m, n)=1\right\}$. Then $n(B)$ is equal to [JEE Main 2025, 22 Jan (Shift 1)]

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Let \(A={1,2,3,\ldots \ldots .,10}\) and \(B=\left\{\frac{m}{n}: m, n \in A, m<n\right.\) and \(\left.\operatorname{g…

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Let \(A={1,2,3,\ldots \ldots .,10}\) and \(B=\left\{\frac{m}{n}: m, n \in A, m&lt;n\right.\) and \(\left.\operatorname{g…

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Let \(A={1,2,3,\ldots \ldots .,10}\) and \(B=\left\{\frac{m}{n}: m, n \in A, m<n\right.\) and \(\left.\operatorname{g…