public class opentasks {
    public List<Contact> open{get;set;}
    public Id Accld{get;set;}
    //public set<string> st;
    public list<Account> le{get;set;}
    public list<wrapperclass> listwrapper{get;set;}
    Public  boolean refreshpage{get;set;}    
    public opentasks(ApexPages.StandardController controller){
        Accld = ApexPages.CurrentPage().getparameters().get('id');
        list<Contact> open1 =new list<Contact>();
        listwrapper = new list<wrapperclass>();
         le =[SELECT Id,BillingState,BillingCountry,BillingStreet,BillingCity,BillingPostalCode,
             (Select Id,Email,MailingState,MailingStreet,MailingCountry,MailingCity,Contact_Type__c,MailingPostalCode 
                             FROM Contacts )
                            FROM Account WHERE Id =:Accld];       
        if(!le.isEmpty()){           
            for(Contact k: le[0].Contacts)
            {
              listwrapper.add(new Wrapperclass(k));            
            }
        }
    }
    public class wrapperclass
    {
        public  boolean checked{get;set;}
        public Contact k{get;set;}
        public Wrapperclass(Contact k){
            this.k=k;
        }
    }
  public PageReference Updates()
    {  
        list<Contact> listofopen=new list<Contact>();
        if(!listwrapper.isEmpty()){
            for(Integer i=0; i<listwrapper.size();i++)
            {
                wrapperclass w = listwrapper[i];           
                if(w.checked==true){
                    system.debug(w);
                    w.k.MailingCountry=le[0].BillingCountry;
                    w.k.MailingStreet=le[0].BillingStreet;
                    w.k.MailingCity=le[0].BillingCity;
                    w.k.MailingState=le[0].BillingState;
                    w.k.MailingPostalCode=le[0].BillingPostalCode;
                    listofopen.add(w.k);
                    //listwrapper.remove(i);
                    //i--;
                    update listofopen;   
   
                                }
             
            }

        }

        if(listofopen.isEmpty())

        {

            ApexPages.addMessage(new ApexPages.Message(ApexPages.Severity.ERROR,'Select atleast one column '));

        }
  return null;
    }  
    public PageReference UpdatesAll()

    {  

        list<Contact> listofopen1=new list<Contact>();
        for(Integer i=0; i<listwrapper.size();i++)
            {
             wrapperclass w = listwrapper[i];
        if(!listwrapper.isEmpty()){
                   
                    system.debug(w);
                    w.k.MailingCountry=le[0].BillingCountry;
                    w.k.MailingStreet=le[0].BillingStreet;
                    w.k.MailingCity=le[0].BillingCity;
                    w.k.MailingState=le[0].BillingState;
                    w.k.MailingPostalCode=le[0].BillingPostalCode;
                    listofopen1.add(w.k);
                    //listwrapper.remove(i);
                   // i--;
                    update listofopen1;      
                                }                                        
            }
               return null; 
        }

}

VisualForce Page:
<apex:page standardController="Account" extensions="opentasks"  >
<apex:form >
        <apex:pageBlock title="Contacts" mode="edit"  id="opnTsks" >
        <apex:Messages /> 
              <apex:pageblockButtons location="Top" >  
              <apex:commandButton value="Update" action="{!Updates}"  id="opnTsks"/>
              <apex:commandButton value="UpdateAll" action="{!UpdatesAll}"  />                
              </apex:pageblockButtons>
                          <apex:pageBlockTable value="{!listwrapper}" var="each" >

                <apex:column headerValue="Action">

                     <apex:inputCheckbox value="{!each.checked}"/>
                   </apex:column>

                <apex:column headerValue="MailingCountry" value="{!each.k.MailingCountry}"/>
                <apex:column headerValue="MailingStreet" value="{!each.k.MailingStreet}"/>
                <apex:column headerValue="MailingCity" value="{!each.k.MailingCity}"/>
                <apex:column headerValue="MailingState" value="{!each.k.MailingState}"/>
                <apex:column headerValue="MailingPostalCode" value="{!each.k.MailingPostalCode}"/>
                
            </apex:pageBlockTable>
            <apex:outputPanel id="refresh" rendered="true">

 <apex:outputPanel id="refresh1" rendered="{!refreshPage}">   
 </apex:outputPanel>
</apex:outputPanel>
         
        </apex:PageBlock>
</apex:form>
</apex:page>