Sir I have a savings of rs 15000 so where can I invest

Ans: start with good mutual funds.

Ans: start with a large cap mutual fund

Ans: Please give some more details as to for how long you wish to invest

Ans: That's a fantastic start! Thinking about long-term investments at your age is a smart decision. Here are some options for where you can invest your Rs.3000 per month, considering a 30-35 year investment horizon:

Systematic Investment Plan (SIP) in Mutual Funds:

This is a popular option for regular investment with rupee-cost averaging. You invest a fixed amount each month, and the units are purchased based on the prevailing Net Asset Value (NAV).
Benefits:
Disciplined Investing: Encourages regular savings and avoids the need to time the market.
Rupee-Cost Averaging: Purchases more units when the NAV is low and fewer units when it's high, potentially balancing the overall cost per unit.
Long-Term Growth: Equity mutual funds have the potential for significant growth over the long term (typically 10+ years).
Investment Options:
Large-cap Funds: Invest in stocks of well-established companies with a proven track record.
Multi-cap Funds: Invest across companies of different market capitalizations (large, mid, and small).
Consider a mix of these based on your risk tolerance.
Here's how to get started with SIP in Mutual Funds:

Choose a SEBI-registered Mutual Fund Company (AMC): Research and compare different AMCs based on their performance and fund offerings.
Select a Suitable Mutual Fund Scheme: Consider your risk tolerance and investment goals.
Open an Investment Account: You can open an account with the AMC directly or through a broker/distributor.
Start your SIP: Set up a recurring transfer of Rs.3000 per month to your chosen SIP.
Additional Tips:

Increase Investment as Income Grows: As your income increases, consider raising your SIP amount to reach your financial goals faster.
Stay Invested for Long Term: Market fluctuations are normal. Don't panic and redeem your investments during downturns. A long-term horizon allows time for the market to recover and potentially generate good returns.
Review and Rebalance: Periodically review your portfolio performance (at least annually) and rebalance if needed to maintain your desired asset allocation.
Other Options to Consider:

Public Provident Fund (PPF): A government-backed scheme offering guaranteed returns and tax benefits. However, PPF has lower liquidity compared to mutual funds.
Employee Provident Fund (EPF): If you're salaried, your employer likely contributes to your EPF. This offers good long-term returns and tax benefits.
Remember:

I can't provide specific financial advice. Consulting a Certified Financial Planner (CFP) can be helpful, especially for a personalized investment plan considering your risk tolerance and goals.
Start with your research! Read about different investment options, mutual funds, and SIPs before making any decisions.
By starting early, investing regularly, and staying disciplined, you can build a significant corpus for your future over the next 30-35 years.