MCQ
If x is a positive integer and 20 x < 100 then find solution set of x.
- A(0, 1, 2, 3, 4, 5)
- B(1, 2, 3, 4, 5)
- C(1, 2, 3, 4)
- D(0, 1, 2, 3, 4)
Solution:
$20\text{x}<100$
Dividing by 20 on both sides, $\text{x}<\Big(\frac{100}{20}\Big)\Rightarrow\text{x}<5$
Since x is a positive integer so x = 1, 2, 3, 4.
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
If A and B are coefficient of xn in the expansions of (1 + x)2n and (1 + x)2n – 1 respectively, then $\frac{\text{A}}{\text{B}}$ equals:
$1.$
$2.$
$\frac{1}{2}.$
$\frac{1}{\text{n}}.$
Hint:
$\frac{\text{A}}{\text{B}}=\frac{^{2\text{n}}\text{C}_\text{n}}{^{2\text{n}-1}\text{C}_\text{n}}=2$One coin is tossed once. Find the probability of getting A tail.
| Size | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| Frequency | 10 | 12 | 25 | 20 | 25 | 15 | 11 |