# Give number of possibilities which can make 15 in plus of 2 numbers. you can also use decimal to make 15 . fx 10+5,9.5+14.5,3.46+11.54.

## 1 Answer

\[{751 \choose 1}=751.\]

After you have chosen a number $A$ between 0 and 750 you will have

\[15=\frac{A}{100}+\frac{1500-A}{100}.\]

Note that we are counting $15=3+12$ and $15=12+3$ only once. If you consider them different, then the number of possible ways will be

\[2\times 751 -1=1501,\]

as $15=7.5+7.5$ should be counted only once.

Savionf

557

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