Question

$\bold{\textbf{\textsf{{\color{cyan}{Question}}}}} \: hii \: koi \: h \:$

The mean of a certain number of items is 20. If an observation 25 is added to the data, the mean becomes 21. Find the no. of items in original data​

Answer 1

See the above attachment

hope it helps uhh Bruhh ❤✌