Role and significance of guassion or normal distribution?

The normal distribution (or Gaussian distribution), also referred as bell curve, is very useful due to the central limit theorem. Normal distribution states which are average of random variables converge in distribution to the normal and are normally distributed when the number of random variables is large.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying