Find the odd one out.
| A | B | C | D |
| 6F | P14 | U21 | W23 |
The lens formula is ______.
\(\frac{1}{v}+\frac{1}{u}=\frac{1}{f}\)
\(\frac{1}{f}+\frac{1}{v}=\frac{1}{u}\)
\(\frac{1}{f}+\frac{1}{u}=\frac{1}{v}\)
\(\frac{1}{v}-\frac{1}{u}=\frac{1}{f}\)
The width of each of the continuous classes in a frequency distribution is 5 and the lower class limit of the lowest class is 10. What is the upper-class limit of the highest class?
What day would it be on 19th April 2020?