Question

Q. 3. Write short notes on :
(1) Estimation of number of people :
(2) Signalling with the help of sound:​

Answer 1

(1) Estimation of number of people

The general rule for estimating is to look at the digit to the right of the digit you want to estimate. Estimating or rounding to the nearest whole number means looking at the digit to the right of the decimal. If you see a digit greater than 5, round up, and if it's less than 5, round down.

Answer 2

Hi I did not understand the question