Question

2) If the reflected ray makes
an angle of 60º with the
normal, what angle must the incident ray
make with
the normal?
​

Answer 1

Explanation:

odd places are occupied by even numbers i.e., 0,2,4

There are 3 places so total =3! ways =6 ways

Now it should be a 6 digit number so the first digit can't be 0

So, we rule out 2 options

=6−2=4 ways

For the even places any of the 3 odd numbers can occupy in 3! ways =6 ways

Total =4.6 ways =24 ways

Answer 2

Answer:

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