If you randomly select 10 stocks for a portfolio and 20 other stocks for a different portfolio, which portfolio is likely to have the lower standard deviation Why ...

The portfolio with 20 randomly selected stocks likely wi ...

If you randomly select 10 stocks for a portfolio and 20 other stocks for a different portfolio,

Question:

If you randomly select 10 for a and 20 other for a different which is likely to have the lower standard deviation? Why?
Stocks
Stocks or shares are generally equity instruments that provide the largest source of raising funds in any public or private listed company's. The instruments are issued on a stock exchange from where a large number of general public who are willing... Portfolio
A portfolio is a grouping of financial assets such as stocks, bonds, commodities, currencies and cash equivalents, as well as their fund counterparts, including mutual, exchange-traded and closed funds. A portfolio can also consist of non-publicly...