Pi radians =180 degrees:
<span>That is, π rad = 180°
</span>
60° in radian measure = 60° × π / 180°
60° × π / 180° = 1/3 π rad
= 0.33333333333π rad
=
1.0471975512 rad
5 numbers chosen from 25 can be done in 25C5 = 25!/(5!*20!) = 53,130 ways. The probability of choosing the correct set of 5 numbers is
1/53,130
It would take 20 minutes to travel 20 miles at 60mph
There are 10 possible digits and 26 possible letters.
To find the answer to this problem we have to multiply 9 as many digits has the hotel reservation number and 26 as many letters it has.
It means:

There are 1,119,214,746 possible reservation numbers.