how to merge coverage for each instances of the agents

You need to look for the class name under the "Types" tree, this gives the merged coverage for all instances of that agent class.

Thanks for the reply Stephen, I can see the bins for the Cover Point here, but I wanted to see the bins that are being created by each instance of the agents. as I am having 20+ instances of the agent so where can I see the bins based on agent number? 

I'm not sure exactly what you're asking, because you initially talked about a "merged" view, and now you mention seeing individual instances. Would you be able to share a small example code that shows how the bins are created for each instance, and what information you're looking for in IMC?

The screenshot you posted yesterday is showing you the bins hit by any instance of the covergroup, hence it's a "merged" view as per your initial request.

True that, initially I asked for the merged coverage, but now I wanted to see the bins that are being created by each instance of the agents. as I have instantiated coverage class for all the agent

class cov extends uvm_component;

// intf //event etc.

covergroup dst_addr_cov @(addr_event);

dst_addr_cp: coverpoint dst_addr {bins dst_addr[] = {[0:18], [20:22], 24, [60:63]};

endgroup : fifoic_dst_addr_cov

//task run_phase(uvm_phase phase);

//house keeping logic to hit the event

endtask endclass : cov

// agent class

class fifoic_agent extends uvm_agent;

blk_env_fifoic_coverage fifoic_cov;
// intf
int agent_num;

`uvm_component_utils(blk_env_fifoic_agent)

// constructor 

function void build_phase(uvm_phase phase);
super.build_phase(phase);
// driver // monitor connections
fifoic_cov = blk_env_fifoic_coverage::type_id::create("fifoic_cov", this);

endfunction : build_phase

function void connect_phase(uvm_phase phase);
driver_h.seq_item_port.connect(sequencer_h.seq_item_export);

//config_db and all the internal signal assignment 

// `ifdef COV
fifoic_cov.fifoic_vif = fifoic_vif[cfg_num];
//`endif
end
endfunction : connect_phase
endclass : blk_env_fifoic_agent

OK, so I think you may only be missing the covergroup "option.per_instance = 1;" setting from your code then. As your coverage is in UVM components you may want to add a coverage control file to your xrun build command (xrun -covfile my.ccf), where the my.ccf contains at least the following options:

select_functional
set_covergroup per_instance_default_one
set_covergroup -new_instance_reporting

You can find details of all these options by searching in support.cadence.com, my main reason for mentioning them here is to highlight the last one, new_instance_reporting, which builds an instance tree in the coverage model, following the UVM testbench hierarchy.

Thanks for response Stephen, I have modified my coverage code based on your suggestions, and after the modification I ran the sim w/ coverage dump, but unfortunately, I am not able to see any beans over here, sorry to bother you w/ the silly issue, I am very new to the IMC, could you please help w/ this?  am attaching the code and the imc snipped: