# Check Mate! - A Problem On Permutations & Combinations -

On the normal chess board as shown, $$I_{1}$$ and $$I_{2}$$ are two insects which start moving towards each other; insect $$I_{1}$$ at the bottom left corner and $$I_{2}$$ at the top right corner. Each insect moves with the same constant speed. Insect $$I_{1}$$ can move only to the right or upward along he lines while the insect $$I_{2}$$ can move only to the left or downward along the lines of the chess board. the total number of ways the two insects can meet at same point during their trip is?

Note by Vatsalya Tandon
2 years, 6 months ago

MarkdownAppears as
*italics* or _italics_ italics
**bold** or __bold__ bold
- bulleted- list
• bulleted
• list
1. numbered2. list
1. numbered
2. list
Note: you must add a full line of space before and after lists for them to show up correctly
paragraph 1paragraph 2

paragraph 1

paragraph 2

[example link](https://brilliant.org)example link
> This is a quote
This is a quote
    # I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
# I indented these lines
# 4 spaces, and now they show
# up as a code block.

print "hello world"
MathAppears as
Remember to wrap math in $$...$$ or $...$ to ensure proper formatting.
2 \times 3 $$2 \times 3$$
2^{34} $$2^{34}$$
a_{i-1} $$a_{i-1}$$
\frac{2}{3} $$\frac{2}{3}$$
\sqrt{2} $$\sqrt{2}$$
\sum_{i=1}^3 $$\sum_{i=1}^3$$
\sin \theta $$\sin \theta$$
\boxed{123} $$\boxed{123}$$

Sort by:

12870

- 8 months, 2 weeks ago