AP EAMCET · Maths · Permutation Combination
In how many ways balls can be picked from black and green colored balls such that at least one black ball is selected?
- A
- B
- C
- D
Answer & Solution
Correct Answer
(C)
Step-by-step Solution
Detailed explanation
All possible cases if at least one Black ball is selected are, 1B 3G, 2B 2G, 3B 1G, 4B 0G Then total number of ways are, =C16×C34+C2×6C24+C3×6C14+C46 =6×4+15×6+20×4+15 =209
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Maths
- \(\lim _{n \rightarrow \infty} \frac{\pi}{2 n}\left[\sin \frac{\pi}{2 n}+\sin \frac{2 \pi}{2 n}+\sin \frac{3 \pi}{2 n}+\ldots+\sin \frac{\pi}{2}\right]=\)AP EAMCET 2025 Medium
- \(\lim _{n \rightarrow \infty}\left(\frac{\sqrt{1}+2 \sqrt{2}+3 \sqrt{3}+\ldots+n \sqrt{n}}{n^{\frac{5}{2}}}\right)=\)AP EAMCET 2018 Medium
- If \(3+i\) and \(2-\sqrt{3}\) are the roots of the equation \(\mathrm{f}(\mathrm{x})=\mathrm{a}_0+\mathrm{a}_1 \mathrm{x}+\mathrm{a}_2 \mathrm{x}^2+\ldots .+\mathrm{a}_{\mathrm{n}} \mathrm{x}^{\mathrm{n}} ; \mathrm{a}_0, \mathrm{a}_1 \ldots . . \mathrm{a}_{\mathrm{n}} \in \mathbb{Z}\), then the least value of \(\mathrm{n}\) and value of \(\mathrm{a}_0\) are respectively.AP EAMCET 2023 Hard
- The figure formed by the four points \((\hat{\mathbf{i}}+\hat{\mathbf{j}}-\hat{\mathbf{k}}),(2 \hat{\mathbf{i}}+3 \hat{\mathbf{j}}),(5 \hat{\mathbf{j}}-2 \hat{\mathbf{k}})\) and \((\hat{\mathbf{k}}-\hat{\mathbf{j}})\) isAP EAMCET 2021 Easy
- The maximum value of the variance of Binomial distribution with parameters \(n\) and \(p\) isAP EAMCET 2022 Easy
- \(f: R \rightarrow R\) and \(g: R \rightarrow R\) are two functions such that \(f(x)=x^2\) and \(g(x)=\frac{1}{x^2}\), then \(x^4(f \circ g)(x)\) is equal toAP EAMCET 2021 Easy
More PYQs from AP EAMCET
- An ideal gas mixture of \(\mathrm{C}_2 \mathrm{H}_6\) and \(\mathrm{C}_2 \mathrm{H}_4\) occupies a volume of 28 L at 1 atm and 273 K. This mixture reacts completely with 128g of \(\mathrm{O}_2\) to produce \(\mathrm{CO}_2\) and \(\mathrm{H}_2 \mathrm{O}(l)\). What is the mole fraction of \(\mathrm{C}_2 \mathrm{H}_4\) in the mixture ?AP EAMCET 2025 Medium
- If \(x=-5+2 \sqrt{-4}\), then the value of \(x^4+9 x^3+35 x^2-x+4\) isAP EAMCET 2022 Medium
- The value of ' \(k\) ' for which the function \(f(x)=k(x+\sin x)+k\) is increasing, is equal toAP EAMCET 2020 Easy
- A thin converging lens of focal length \(25 \mathrm{~cm}\) forms a sharp image of an object on a screen placed at a distance of \(75 \mathrm{~cm}\) from the lens. Later the screen is moved closer to the lens by a distance \(25 \mathrm{~cm}\). The distance through which the object is to be shifted so that its image on the screen is sharp again isAP EAMCET 2019 Hard
- The ratio of minimum wave length of Balmer series to maximum wavelength in Brackett series in hydrogen spectrum isAP EAMCET 2024 Medium
- The natural frequency of an \(L-C\) circuit is \(125 \mathrm{kHz}\). When the capacitor is totally filled with a dielectric material, the natural frequency decreases by \(25 \mathrm{kHz}\). Dielectric constant of the material is nearlyAP EAMCET 2016 Medium